items.jsonl

{"id": 2, "question": "Model the kinetic dissolution of 1 mole of Calcite (CaCO3​) in a hydrothermal solution at 100°C, pe of 4 and pH 5, containing 0.5 mmol/kgw of dissolved inorganic carbon and 1 mmol/kgw of Manganese. The simulation should track the reaction over 1000 seconds, broken into 100 discrete time steps. Use a kinetic rate law based on a specific surface area of 10.0 and a rate constant of 0.001.\r\n\r\nAt reaction step 100, what is the pH?\r\n\r\nA. 5.535\r\nB. 5.537\r\nC. 5.534\r\nD. 5.538", "answer": "C"}
{"id": 7, "question": "Model the kinetic dissolution of 1 mole of Calcite (CaCO3​) in a hydrothermal solution at 100°C, pe of 4 and pH 5, containing 0.5 mmol/kgw of dissolved inorganic carbon and 1 mmol/kgw of Manganese. The simulation should track the reaction over 1000 seconds, broken into 100 discrete time steps. Use a kinetic rate law based on a specific surface area of 10.0 and a rate constant of 0.001.\r\n\r\nAt reaction step 47, what is the saturation index of Aragonite?\r\n\r\nA. -5.04\r\nB. -5.08\r\nC. -5.06\r\nD. -5.07", "answer": "C"}
{"id": 9, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 100, what is the pH?\r\n\r\nA. 2.129\r\nB. 2.130\r\nC. 2.126\r\nD. 2.128", "answer": "A"}
{"id": 10, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 100, what is the saturation index of Witherite?\r\n\r\nA. -9.35\r\nB. -9.38\r\nC. -9.36\r\nD. -9.33", "answer": "C"}
{"id": 11, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 100, what is the molality of CO2?\r\n\r\nA. 1.590e-03\r\nB. 1.590e-04\r\nC. 1.591e-03\r\nD. 1.585e-03", "answer": "A"}
{"id": 12, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 100, what is the total alkalinity?\r\n\r\nA. -9.265e-03\r\nB. -9.260e-03\r\nC. -9.261e-03\r\nD. -9.262e-03", "answer": "B"}
{"id": 13, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 10, what is the pH?\r\n\r\nA. 2.014\r\nB. 2.008\r\nC. 2.013\r\nD. 2.009", "answer": "C"}
{"id": 14, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 10, how many moles of calcite are present?\r\n\r\nA. 9.995e-01\r\nB. 9.988e-01\r\nC. 9.997e-01\r\nD. 9.998e-01", "answer": "D"}
{"id": 15, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 10, is the saturation index of witherite higher or lower than at reaction step 100?\r\n\r\nA. Higher\r\nB. Lower\r\nC. the same\r\nD. N/A", "answer": "B"}
{"id": 16, "question": "1 mole of Calcite (CaCO3​) reacts with an acidic pH 2 solution at 200 degrees Celsius. The initial solution contains 10 mmol/kgw of Copper (Cu2+) and 5 mmol/kgw of Barium, with an oxidation potential (pe) of 4. Model the reaction kinetics over a 1000-second duration (using 100 time steps), using a specific surface area of 1.0 and a rate constant of 10.\r\n\r\nAt reaction step 10, are there more species of C (4) or Cu (2) present?\r\n\r\nA. More Cu (2)\r\nB. More C (4)\r\nC. the same number\r\nD. neither are present", "answer": "B"}
{"id": 17, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, how many moles of albite have dissolved?\r\n\r\nA. 2.293e-04\r\nB. 2.294e-04\r\nC. 2.296e-04\r\nD. 2.298e-04", "answer": "A"}
{"id": 18, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, what is the pe?\r\n\r\nA. -.080\r\nB. -.086\r\nC. -.083\r\nD. -.081", "answer": "D"}
{"id": 19, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, how many moles of Si are in solution?\r\n\r\nA. 6.880e-04\r\nB. 6.882e-04\r\nC. 6.879e-04\r\nD. 6.883e-04", "answer": "C"}
{"id": 20, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, which dissolved species is present at the highest molality?\r\n\r\nA. Fe\r\nB. Na\r\nC. S\r\nD. Al", "answer": "C"}
{"id": 21, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, what is the ionic strength of the solution?\r\n\r\nA. 2.162e-02\r\nB. 2.166e-02\r\nC. 2.163e-02\r\nD. 2.164e-02", "answer": "B"}
{"id": 23, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 10, is there more or less Ba+2 in solution than at reaction step 70?\r\n\r\nA. More\r\nB. Less\r\nC. Nonzero same amount of both\r\nD. Neither exist in solution", "answer": "D"}
{"id": 24, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, how many moles of H2S gas has dissolved into solution?\r\n\r\nA. 3.041e-02\r\nB. 3.044e-02\r\nC. 3.042e-02\r\nD. 3.040e-02", "answer": "A"}
{"id": 25, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, what is the saturation index of Goethite?\r\n\r\nA. -1.70\r\nB. -1.69\r\nC. -1.75\r\nD. -1.72", "answer": "D"}
{"id": 26, "question": "Model the kinetic dissolution of 1 mole of Albite  over 1000 seconds (100 time steps) in a pH 2 solution at 200°C containing 4 mmol/kgw Fe+3 and 4mmol/kgw Fe+2 using a specific surface area of 1.0 and a rate constant of 10. Simultaneously, equilibrate the solution with a fixed-pressure gas phase containing 5 atmospheres of Hydrogen Sulfide (H2​S).\r\n\r\nAt reaction step 100, how many species of Si are present in solution?\r\n\r\nA. 3\r\nB. 5\r\nC. 10\r\nD. 2", "answer": "A"}
{"id": 27, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 20°C, what is the pH of the mixture?\r\n\r\nA. 10.037\r\nB. 10.036\r\nC. 10.035\r\nD. 10.034", "answer": "A"}
{"id": 28, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 180°C, what is the pH of the mixture?\r\n\r\nA. 7.405\r\nB. 7.402\r\nC. 7.401\r\nD. 7.400", "answer": "D"}
{"id": 29, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 200°C, how many moles of calcite have precipitated in the mixture?\r\n\r\nA. 4.986e-02\r\nB. 4.987e-02\r\nC. 4.984e-02\r\nD. 4.983e-02", "answer": "B"}
{"id": 30, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 100°C, how many moles of calcite have precipitated in the mixture?\r\n\r\nA. 4.973e-02\r\nB. 4.971e-02\r\nC. 4.970e-02\r\nD. 4.972e-02", "answer": "D"}
{"id": 31, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 100°C, what is the ionic strength of the mixture?\r\n\r\nA. 4.068e-04\r\nB. 4.063e-04\r\nC. 4.066e-04\r\nD. 4.064e-04", "answer": "C"}
{"id": 32, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 160°C, how many species of Ca are present in the mixture?\r\n\r\nA. 2\r\nB. 0\r\nC. 4\r\nD. 1", "answer": "C"}
{"id": 33, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 160°C, what is the saturation index of aragonite in the mixture?\r\n\r\nA. -0.82\r\nB. -0.80\r\nC. -0.85\r\nD. -0.83", "answer": "A"}
{"id": 34, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 20°C is there more or less moles of C (4) present than moles of Ca in the mixture?\r\n\r\nA. More\r\nB. Less\r\nC. Same\r\nD. N/A", "answer": "C"}
{"id": 35, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 200°C what is the density of the solution?\r\n\r\nA. 0.86469\r\nB. 0.86468\r\nC. 0.86463\r\nD. 0.86465", "answer": "B"}
{"id": 36, "question": "Simulate the mixing of two aqueous solutions in 1:1 proportions: the first containing 50 mmol/kg of dissolved inorganic carbon and the second containing 50 mmol/kg of calcium, as it is heated from 20°C to 200°C in 10 discrete steps, accounting for the precipitation and dissolution of calcite.\r\n\r\nAt 200°C what is the log IAP of calcite in the mixture?\r\n\r\nA. -12.29\r\nB. -12.21\r\nC. -12.23\r\nD. -12.26", "answer": "D"}
{"id": 38, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nWhat is the saturation index of aragonite?\r\n\r\nA. -0.47\r\nB. -0.45\r\nC. -0.44\r\nD. -0.43", "answer": "B"}
{"id": 39, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nWhat is the pe in the solution?\r\n\r\nA. -4.646\r\nB. -4.644\r\nC. -4.645\r\nD. -4.647", "answer": "A"}
{"id": 40, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nHow many moles of calcite have precipitated?\r\n\r\nA. 3.644e-02\r\nB. 3.646e-02\r\nC. 3.647e-02\r\nD. 3.645e-02", "answer": "B"}
{"id": 41, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nHow many moles of CH4 gas dissolved into solution?\r\n\r\nA. 2.913e-04\r\nB. 2.916e-04\r\nC. 2.912e-04\r\nD. 2.911e-04", "answer": "A"}
{"id": 42, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nWhich gas had the most moles dissolve?\r\n\r\nA. CO2\r\nB. H2S\r\nC. CH4\r\nD. All the same", "answer": "B"}
{"id": 43, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nWhat is the molality of S in solution?\r\n\r\nA. 4.737e-02\r\nB. 4.738e-02\r\nC. 4.736e-02\r\nD. 4.735e-02", "answer": "A"}
{"id": 44, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nWhat is the specific conductance of the solution?\r\n\r\nA. 7949\r\nB. 7943\r\nC. 7944\r\nD. 7948", "answer": "D"}
{"id": 45, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nWhat is the alkalinity of the solution?\r\n\r\nA. 2.690e-02\r\nB. 2.694e-02\r\nC. 2.692e-02\r\nD. 2.693e-02", "answer": "B"}
{"id": 46, "question": "Simulate the equilibration of a 100°C solution containing 50 mmol/kgw Ca (pH charge-balanced) with a mineral assemblage of Calcite, Gypsum, and Aragonite. Simultaneously equilibrate the system with a 1 atm gas phase (at 25°C) composed of CO2 at partial pressure 1 atm, CH4 at partial pressure 5 atm, and H2S at partial pressure 10 atm.\r\n\r\nHow many species of Ca are present in solution?\r\n\r\nA. 6\r\nB. 8\r\nC. 7\r\nD. 4", "answer": "A"}
{"id": 47, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nWhat is the pH of the solution?\r\n\r\nA. 5.506\r\nB. 5.509\r\nC. 5.507\r\nD. 5.508", "answer": "B"}
{"id": 49, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nWhat is the specific conductance of the solution?\r\n\r\nA. 124109\r\nB. 124104\r\nC. 124108\r\nD. 124103", "answer": "C"}
{"id": 50, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nWhat is the molality of Al (OH) 4- in the solution?\r\n\r\nA. 2.243e-06\r\nB. 2.242e-06\r\nC. 2.241e-06\r\nD. 2.240e-06", "answer": "B"}
{"id": 51, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nIs there more moles of Fe (2) or Fe (3) in solution?\r\n\r\nA. Fe (2)\r\nB. Fe (3)\r\nC. Same\r\nD. N/A", "answer": "B"}
{"id": 52, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nAre there fewer species of Fe (2) or Fe (3) in solution?\r\n\r\nA. Fe (2)\r\nB. Fe (3)\r\nC. same\r\nD. n/a", "answer": "A"}
{"id": 53, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nHow many species of Al are in solution?\r\n\r\nA. 5\r\nB. 6\r\nC. 8\r\nD. 4", "answer": "C"}
{"id": 55, "question": "Simulate a 100°C pure water solution at pH 3 at equilibrium with 10 moles each of K-mica, Kaolinite, Dolomite, Epsomite, Amorphous Ferric Hydroxide [Fe(OH)3(a)], and Halite.\r\n\r\nWhat is the saturation index of Mirabilite?\r\n\r\nA. -1.92\r\nB. -1.89\r\nC. -1.91\r\nD. -1.90", "answer": "D"}
{"id": 57, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nWhat is the pH?\r\n\r\nA. 7.417\r\nB. 7.416\r\nC. 7.414\r\nD. 7.418", "answer": "A"}
{"id": 58, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nWhat is the specific conductance?\r\n\r\nA. 10113\r\nB. 10114\r\nC. 10115\r\nD. 10116", "answer": "D"}
{"id": 59, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nWhat is the ionic strength of the solution?\r\n\r\nA. 1.684e-01\r\nB. 1.685e-01\r\nC. 1.686e-01\r\nD. 1.688e-01", "answer": "B"}
{"id": 60, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nWhich mineral dissolved the most?\r\n\r\nA. Rhodochrosite\r\nB. Sepiolite and Sepiolite(d)\r\nC. Talc\r\nD. None", "answer": "B"}
{"id": 61, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nWhich mineral had net precipitation?\r\n\r\nA. Talc\r\nB. Rhodochrosite\r\nC. Sepiolite(d)\r\nD. None", "answer": "A"}
{"id": 62, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nHow many moles of talc were present in the final assemblage?\r\n\r\nA. 2.332e+01\r\nB. 2.334e+01\r\nC. 2.330e+01\r\nD. 2.333e+01", "answer": "D"}
{"id": 63, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nHow many species of C (4) are present in the solution?\r\n\r\nA. 16\r\nB. 13\r\nC. 9\r\nD. 4", "answer": "B"}
{"id": 65, "question": "Simulate the geochemical equilibration of 1 kg of a 100°C aqueous solution at pH 5 containing 100 mmol/kgw of dissolved Barium at equilibrium with a mineral assemblage consisting of 10 moles each of Talc, Rhodochrosite, Sepiolite (including the disordered form), and Lead Hydroxide [Pb(OH)2​].\r\n\r\nWhat is the saturation index of Sepiolite(d)?\r\n\r\nA. -8.81\r\nB. -8.83\r\nC. -8.82\r\nD. -8.86", "answer": "C"}
{"id": 67, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the pH?\r\n\r\nA. 0.944\r\nB. 0.943\r\nC. 0.945\r\nD. 0.946", "answer": "C"}
{"id": 68, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the saturation index of pyrite?\r\n\r\nA. -219.40\r\nB. -219.43\r\nC. -219.46\r\nD. -219.44", "answer": "B"}
{"id": 69, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the pe of the solution?\r\n\r\nA. 19.678\r\nB. 19.676\r\nC. 19.679\r\nD. 19.674", "answer": "A"}
{"id": 70, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the specific conductance?\r\n\r\nA. 55869\r\nB. 55868\r\nC. 55866\r\nD. 55865", "answer": "C"}
{"id": 71, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the alkalinity?\r\n\r\nA. -3.630e-01\r\nB. -3.631e-01\r\nC. -3.632e-01\r\nD. -3.633e-01", "answer": "A"}
{"id": 72, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nHow many species of Fe (3) are present in solution?\r\n\r\nA. 10\r\nB. 8\r\nC. 5\r\nD. 7", "answer": "A"}
{"id": 73, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the saturation index of hematite?\r\n\r\nA. 2.00\r\nB. 2.03\r\nC. 2.02\r\nD. 2.01", "answer": "D"}
{"id": 74, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the molality of H+ in the solution?\r\n\r\nA. 1.438e-01\r\nB. 1.434e-01\r\nC. 1.437e-01\r\nD. 1.439e-01", "answer": "A"}
{"id": 75, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nWhat is the molality of S (6) in the solution?\r\n\r\nA. 2.008e-01\r\nB. 2.006e-01\r\nC. 2.003e-01\r\nD. 2.004e-01", "answer": "B"}
{"id": 76, "question": "Simulate the equilibrium oxidation of Pyrite in 1 kg of pure water at 25°C. The system starts at a neutral pH (7.0) and is exposed to a constant atmospheric oxygen source (log PO2​​=−0.7). Allow up to 0.1 moles of Pyrite to react and the potential precipitation of Goethite and Gypsum.\r\n\r\nAre there more moles of Fe (2) or Fe (3) in solution?\r\n\r\nA. Fe (2)\r\nB. Fe (3)\r\nC. Same\r\nD. N/A", "answer": "B"}
{"id": 77, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat is the pH?\r\n\r\nA. 6.614\r\nB. 6.615\r\nC. 6.617\r\nD. 6.618", "answer": "D"}
{"id": 79, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat is the saturation index of N2?\r\n\r\nA. 2.08\r\nB. 2.07\r\nC. 2.09\r\nD. 2.05", "answer": "C"}
{"id": 80, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nHow many species of C (4) are present in solution?\r\n\r\nA. 4\r\nB. 3\r\nC. 0\r\nD. 1", "answer": "A"}
{"id": 81, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nIs the molality of NH4+ or NH3 higher?\r\n\r\nA. NH4+\r\nB. NH3\r\nC. Same\r\nD. N/A", "answer": "A"}
{"id": 82, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat is the alkalinity?\r\n\r\nA. 5.161e-03\r\nB. 5.160e-03\r\nC. 5.162e-03\r\nD. 5.165e-03", "answer": "B"}
{"id": 83, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat is the molality of N in solution?\r\n\r\nA. 1.475e-01\r\nB. 1.478e-01\r\nC. 1.474e-01\r\nD. 1.476e-01", "answer": "D"}
{"id": 84, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat is the specific conductance of the solution?\r\n\r\nA. 774\r\nB. 773\r\nC. 770\r\nD. 772", "answer": "A"}
{"id": 85, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat was the delta of moles of CH4?\r\n\r\nA. 5.275e-02\r\nB. 5.277e-02\r\nC. 5.276e-02\r\nD. 5.278e-02", "answer": "B"}
{"id": 86, "question": "Simulate the equilibration of 1 kg of pure water at 150°C (neutral pH 7, pe 4) with a fixed-pressure gas phase. The gas phase is also maintained at 150°C and a total pressure of 1 atm, consisting of a mixture of 10 moles of Methane (CH4​), 10 moles of Carbon Dioxide (CO2​), and 5 moles of Ammonia (NH3​).\r\n\r\nWhat is the pe of the final solution?\r\n\r\nA. -5.196\r\nB. -5.200\r\nC. -5.198\r\nD. -5.199", "answer": "D"}
{"id": 87, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the pH?\r\n\r\nA. 7.493\r\nB. 7.494\r\nC. 7.491\r\nD. 7.492", "answer": "D"}
{"id": 88, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the specific conductance?\r\n\r\nA. 44\r\nB. 46\r\nC. 47\r\nD. 48", "answer": "B"}
{"id": 89, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the pe?\r\n\r\nA. 3.506\r\nB. 3.509\r\nC. 3.504\r\nD. 3.508", "answer": "D"}
{"id": 90, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the ionic strength?\r\n\r\nA. 8.538e-05\r\nB. 8.539e-05\r\nC. 8.537e-05\r\nD. 8.536e-05", "answer": "A"}
{"id": 91, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the log IAP of Chrysotile?\r\n\r\nA. 21.13\r\nB. 21.15\r\nC. 21.14\r\nD. 21.18", "answer": "C"}
{"id": 92, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nHow many species of Si are present?\r\n\r\nA. 1\r\nB. 2\r\nC. 3\r\nD. 5", "answer": "C"}
{"id": 93, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the saturation index of Chalcedony?\r\n\r\nA. -2.33\r\nB. -2.37\r\nC. -2.30\r\nD. -2.36", "answer": "D"}
{"id": 94, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the saturation index of quartz?\r\n\r\nA. -2.20\r\nB. -2.24\r\nC. -2.21\r\nD. -2.28", "answer": "C"}
{"id": 95, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nWhat is the molality of MgOH+?\r\n\r\nA. 6.818e-06\r\nB. 6.814e-06\r\nC. 6.816e-06\r\nD. 6.817e-06", "answer": "C"}
{"id": 96, "question": "Simulate a solution of pure water at pH 7 and 150°C at equilibrium with 10 moles of chrysotile and 10 moles of talc.\r\n\r\nIs there more Mg or Si in solution?\r\n\r\nA. Mg\r\nB. Si\r\nC. Same\r\nD. N/A", "answer": "A"}
{"id": 97, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the molality of Alkalinity?\r\n\r\nA. 4.995e-03\r\nB. 4.993e-03\r\nC. 4.997e-03\r\nD. 4.999e-03", "answer": "C"}
{"id": 98, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the molality of Ca?\r\n\r\nA. 2.496e-03\r\nB. 2.498e-03\r\nC. 2.495e-03\r\nD. 2.494e-03", "answer": "A"}
{"id": 99, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the total carbon?\r\n\r\nA. 5.280e-03\r\nB. 5.284e-03\r\nC. 5.285e-03\r\nD. 5.287e-03", "answer": "D"}
{"id": 100, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the electrical balance?\r\n\r\nA. -5.431e-06\r\nB. -5.435e-06\r\nC. -5.436e-06\r\nD. -5.438e-06", "answer": "A"}
{"id": 101, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the specific conductance?\r\n\r\nA. 464\r\nB. 468\r\nC. 473\r\nD. 463", "answer": "D"}
{"id": 102, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the saturation index of Aragonite?\r\n\r\nA. 0.40\r\nB. 0.39\r\nC. 0.42\r\nD. 0.41", "answer": "A"}
{"id": 103, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the saturation index of O2 (g)?\r\n\r\nA. -37.20\r\nB. -37.18\r\nC. -37.19\r\nD. -37.21", "answer": "C"}
{"id": 104, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the activity of CO2?\r\n\r\nA. 3.193e-04\r\nB. 3.199e-04\r\nC. 3.198e-04\r\nD. 3.197e-04", "answer": "D"}
{"id": 105, "question": "Create a solution at 25 degrees C, pH 7.5, 100 mg/L Ca, and 250 mg/L Alkalinity as CaCO3.\r\n\r\nWhat is the activity of H2?\r\n\r\nA. 7.079e-27\r\nB. 7.070e-27\r\nC. 7.073e-27\r\nD. 7.075e-27", "answer": "A"}
{"id": 106, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the molality of Cl?\r\n\r\nA. 5.707e+00\r\nB. 5.710e+00\r\nC. 5.709e+00\r\nD. 5.708e+00", "answer": "A"}
{"id": 107, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the pH of the mixture?\r\n\r\nA. 6.732\r\nB. 6.730\r\nC. 6.733\r\nD. 6.731", "answer": "C"}
{"id": 109, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nwhat is the electrical balance?\r\n\r\nA. -5.703e+00\r\nB. -5.707e+00\r\nC. -5.709e+00\r\nD. -5.710e+00", "answer": "B"}
{"id": 110, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the viscosity of the mixture?\r\n\r\nA. 0.89229\r\nB. 0.89829\r\nC. 0.89429\r\nD. 0.89329", "answer": "D"}
{"id": 111, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the specific conductance of the mixture?\r\n\r\nA. 263753\r\nB. 263768\r\nC. 263761\r\nD. 263760", "answer": "D"}
{"id": 112, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the saturation index of H2O (g)?\r\n\r\nA. -1.55\r\nB. -1.51\r\nC. -1.54\r\nD. -1.53", "answer": "A"}
{"id": 113, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the activity of H+ in the mixture?\r\n\r\nA. 1.850e-07\r\nB. 1.852e-07\r\nC. 1.851e-07\r\nD. 1.855e-07", "answer": "C"}
{"id": 114, "question": "Create a solution of river water, pH 6.0 and Cl 10, and seawater. pH 8.1 and Cl 19000. Mix them at a 0.7:0.3 ratio.\r\n\r\nWhat is the molality of HCl?\r\n\r\nA. 1.286e-08\r\nB. 1.285e-08\r\nC. 1.283e-08\r\nD. 1.280e-08", "answer": "A"}
{"id": 116, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the pH of the final solution?\r\n\r\nA. 1.013\r\nB. 1.010\r\nC. 1.019\r\nD. 1.018", "answer": "A"}
{"id": 117, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the ionic strength of the final solution?\r\n\r\nA. 1.397e-01\r\nB. 1.394e-01\r\nC. 1.399e-01\r\nD. 1.391e-01", "answer": "D"}
{"id": 120, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the activity of H+ in the final solution?\r\n\r\nA. 9.706e-02\r\nB. 9.704e-02\r\nC. 9.700e-02\r\nD. 9.703e-02", "answer": "A"}
{"id": 121, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the pH in solution of reaction step 1?\r\n\r\nA. 2.750\r\nB. 2.751\r\nC. 2.748\r\nD. 2.745", "answer": "B"}
{"id": 122, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the viscosity of the solution at reaction step 1?\r\n\r\nA. 0.89067\r\nB. 0.89064\r\nC. 0.89058\r\nD. 0.89059", "answer": "B"}
{"id": 123, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the pH of the solution at reaction step 2?\r\n\r\nA. 2.129\r\nB. 2.122\r\nC. 2.127\r\nD. 2.124", "answer": "D"}
{"id": 124, "question": "Create an initial solution of pure water at pH 7.0 Add in steps .001, 0.005, 0.01, 0.05 , and 0.1 moles of sulfuric acid.\r\n\r\nWhat is the activity of H+ at reaction step 2?\r\n\r\nA. 7.513e-03\r\nB. 7.514e-03\r\nC. 7.512e-03\r\nD. 7.516e-03", "answer": "A"}
{"id": 126, "question": "Create an initial solution of pure water at pH 7.0 and place it at equilibrium with 10 moles of gypsum.\r\n\r\nWhat is the pH of the solution?\r\n\r\nA. 7.066\r\nB. 7.065\r\nC. 7.062\r\nD. 7.068", "answer": "A"}
{"id": 127, "question": "Create an initial solution of pure water at pH 7.0 and place it at equilibrium with 10 moles of gypsum.\r\n\r\nWhat is the ionic strength of the solution?\r\n\r\nA. 4.1741e-02\r\nB. 4.176e-02\r\nC. 4.174e-02\r\nD. 4.172e-02", "answer": "C"}
{"id": 129, "question": "Create an initial solution of pure water at pH 7.0 and place it at equilibrium with 10 moles of gypsum.\r\n\r\nWhat is the saturation index of anhydrite?\r\n\r\nA. -0.30\r\nB. -0.35\r\nC. -0.28\r\nD. -0.34", "answer": "A"}
{"id": 131, "question": "Create an initial solution of pure water at pH 7.0 and place it at equilibrium with 10 moles of gypsum.\r\n\r\nWhat is the activity of OH-?\r\n\r\nA. 1.179e-07\r\nB. 1.176e-07\r\nC. 1.178e-07\r\nD. 1.172e-07", "answer": "C"}
{"id": 132, "question": "Create an initial solution of pure water at pH 7.0 and place it at equilibrium with 10 moles of gypsum.\r\n\r\nWhat is the molality of CaHSO4+?\r\n\r\nA. 3.162e-09\r\nB. 3.161e-09\r\nC. 3.168e-09\r\nD. 3.160e-09", "answer": "A"}
{"id": 134, "question": "Create an initial solution of pure water at pH 7.0 and place it at equilibrium with 10 moles of gypsum.\r\n\r\nWhat is the final number of moles of gypsum in the assemblage?\r\n\r\nA. 9.985e+00\r\nB. 9.986e+00\r\nC. 9.988e+00\r\nD. 9.980e+00", "answer": "A"}
{"id": 135, "question": "Create an initial solution of pure water at pH 7.0 and 25 degrees Celsius. Place it in equilibrium with 10 moles of CO2 at -3.4 log PCO2.\r\n\r\nWhat is the pH?\r\n\r\nA. 5.610\r\nB. 5.619\r\nC. 5.617\r\nD. 5.613", "answer": "A"}
{"id": 137, "question": "Create an initial solution of pure water at pH 7.0 and 25 degrees Celsius. Place it in equilibrium with 10 moles of CO2 at -3.4 log PCO2.\r\n\r\nWhat is the ionic strength?\r\n\r\nA. 2.462e-06\r\nB. 2.466e-06\r\nC. 2.461e-06\r\nD. 2.457e-06", "answer": "C"}
{"id": 139, "question": "Create an initial solution of pure water at pH 7.0 and 25 degrees Celsius. Place it in equilibrium with 10 moles of CO2 at -3.4 log PCO2.\r\n\r\nWhat is the delta of CO2 (g)?\r\n\r\nA. -1.600e-05\r\nB. -1.594e-05\r\nC. -1.500e-05\r\nD. -1.606e-05", "answer": "A"}
{"id": 141, "question": "Create an initial solution of pure water at pH 7.0 and 25 degrees Celsius. Place it in equilibrium with 10 moles of CO2 at -3.4 log PCO2.\r\n\r\nWhat is the activity of H+?\r\n\r\nA. 2.459e-06\r\nB. 2.456e-06\r\nC. 2.452e-06\r\nD. 2.457e-06", "answer": "B"}
{"id": 142, "question": "Create an initial solution of pure water at pH 7.0 and 25 degrees Celsius. Place it in equilibrium with 10 moles of CO2 at -3.4 log PCO2.\r\n\r\nWhat is the molality of OH-?\r\n\r\nA. 4.129e-09\r\nB. 4.136e-09\r\nC. 4.131e-09\r\nD. 4.122e-09", "answer": "A"}
{"id": 143, "question": "Create an initial solution of pure water at pH 7.0 and 25 degrees Celsius. Place it in equilibrium with 10 moles of CO2 at -3.4 log PCO2.\r\n\r\nWhat is the log IAP of CO2 (g)?\r\n\r\nA. -4.80\r\nB. -4.84\r\nC. -4.87\r\nD. -4.86", "answer": "C"}
{"id": 144, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the pe of solution 10 at transport 10?\r\n\r\nA. -1.452\r\nB. -1.453\r\nC. -1.451\r\nD. -1.454", "answer": "A"}
{"id": 146, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nHow many moles of CaX2 are on exchange site 1 at transport step 5?\r\n\r\nA. 4.284e-04\r\nB. 4.287e-04\r\nC. 4.283e-04\r\nD. 4.280e-04", "answer": "A"}
{"id": 147, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the specific conductance of solution 1 at transport step 5?\r\n\r\nA. 124\r\nB. 126\r\nC. 122\r\nD. 123", "answer": "D"}
{"id": 148, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the concentration of Na of solution 1 at transport step 5?\r\n\r\nA. 9.875e-04\r\nB. 9.871e-04\r\nC. 9.872e-04\r\nD. 9.869e-04", "answer": "B"}
{"id": 149, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the molality of NaX at transport step 4, exchange 1?\r\n\r\nA. 1.301e-04\r\nB. 1.304e-04\r\nC. 1.302e-04\r\nD. 1.306e-04", "answer": "B"}
{"id": 150, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the equivalent fraction of CaX2 at exchange 8 at transport step 4?\r\n\r\nA. 1.000e+00\r\nB. 9.900e-01\r\nC. 9.998e-01\r\nD. 9.999e-01", "answer": "A"}
{"id": 152, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the equivalent fraction of CaX2 at exchange 1 at transport step 6?\r\n\r\nA. 8.453e-01\r\nB. 8.457e-01\r\nC. 8.450e-01\r\nD. 8.452e-01", "answer": "B"}
{"id": 154, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the viscosity of solution 1 at transport step 6?\r\n\r\nA. 0.89023\r\nB. 0.89021\r\nC. 0.89026\r\nD. 0.89028", "answer": "C"}
{"id": 155, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the molality of Ca+2 in solution 1 at transport step 6?\r\n\r\nA. 5.506e-06\r\nB. 5.502e-06\r\nC. 5.508e-06\r\nD. 5.501e-06", "answer": "A"}
{"id": 156, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nHow many moles of NaX are present at exchange 4 at transport step 10?\r\n\r\nA. 9.498e-05\r\nB. 9.496e-05\r\nC. 9.493e-05\r\nD. 9.491e-05", "answer": "A"}
{"id": 157, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the molality of HCl at solution 4 at transport step 10?\r\n\r\nA. 3.323e-11\r\nB. 3.326e-11\r\nC. 3.320e-11\r\nD. 3.319e-11", "answer": "C"}
{"id": 158, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the saturation index of H2O (g) at solution 4 and transport step 10?\r\n\r\nA. -1.51\r\nB. -1.48\r\nC. -1.53\r\nD. -1.50", "answer": "D"}
{"id": 161, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the activity of Na+ in solution 3 at transport step 10?\r\n\r\nA. 9.444e-04\r\nB. 9.443e-04\r\nC. 9.448e-04\r\nD. 9.440e-04", "answer": "A"}
{"id": 162, "question": "Set up a 1D transport problem with 10 cells and 10 shifts. The initial solution is at pH 7.0, Ca 1.0, and Cl 2.0 . The infilling solution is pH 7.0, Na 1.0, Cl 1.0. For all 10 cells, define 0.001 moles of exchange site, equilibrate 1.\r\n\r\nWhat is the alkalinity of solution 3 at transport step 10?\r\n\r\nA. 1.417e-09\r\nB. 1.415e-09\r\nC. 1.419e-09\r\nD. 1.410e-09", "answer": "A"}
{"id": 173, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the pH at reaction step 5?\r\n\r\nA. 6.175\r\nB. 6.178\r\nC. 6.172\r\nD. 6.171", "answer": "B"}
{"id": 174, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the specific conductance at reaction step 5?\r\n\r\nA. 76\r\nB. 79\r\nC. 77\r\nD. 73", "answer": "C"}
{"id": 175, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the ionic strength at reaction step 5?\r\n\r\nA. 3.389e-04\r\nB. 3.385e-04\r\nC. 3.382e-04\r\nD. 3.384e-04", "answer": "B"}
{"id": 176, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the molality of Ba at reaction step 5?\r\n\r\nA. 1.460e-05\r\nB. 1.458e-05\r\nC. 1.452e-05\r\nD. 1.456e-05", "answer": "D"}
{"id": 177, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the saturation index of Barite at reaction step 5?\r\n\r\nA. 0.72\r\nB. 0.77\r\nC. 0.78\r\nD. 0.73", "answer": "A"}
{"id": 178, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the saturation index of Barite at reaction step 4?\r\n\r\nA. 0.76\r\nB. 0.72\r\nC. 0.73\r\nD. 0.78", "answer": "A"}
{"id": 179, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the specific conductance of the solution at reaction step 4?\r\n\r\nA. 61\r\nB. 67\r\nC. 63\r\nD. 62", "answer": "C"}
{"id": 180, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the saturation index of Barite at reaction step 3?\r\n\r\nA. 0.82\r\nB. 0.83\r\nC. 0.85\r\nD. 0.88", "answer": "B"}
{"id": 181, "question": "Create a solution at 25 degrees C, 2.0 mg/L Ba, 15.0 mg/L S(6). Raise the temperature from 25 to 95 in 5 steps.\r\n\r\nWhat is the molality of S(6) at reaction step 3?\r\n\r\nA. 1.563e-04\r\nB. 1.561e-04\r\nC. 1.562e-04\r\nD. 1.566e-04", "answer": "B"}
{"id": 182, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the viscosity of the resulting solution?\r\n\r\nA. 1.13759\r\nB. 1.13757\r\nC. 1.13758\r\nD. 1.13753", "answer": "B"}
{"id": 183, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nHow many moles of CH4(g) are there?\r\n\r\nA. 2.991e-03\r\nB. 2.993e-03\r\nC. 2.992e-03\r\nD. 2.990e-03", "answer": "C"}
{"id": 184, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the molality of C(-4) in solution?\r\n\r\nA. 2.009e-03\r\nB. 2.008e-03\r\nC. 2.003e-03\r\nD. 2.002e-03", "answer": "B"}
{"id": 185, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the saturation index of CO2(g)?\r\n\r\nA. -7.81\r\nB. -7.88\r\nC. -7.83\r\nD. -7.86", "answer": "D"}
{"id": 187, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the pe of the solution?\r\n\r\nA. -4.587\r\nB. -4.588\r\nC. -4.584\r\nD. -4.581", "answer": "C"}
{"id": 188, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the molality of CO2 in solution?\r\n\r\nA. 6.279e-10\r\nB. 6.278e-10\r\nC. 6.277e-10\r\nD. 6.273e-10", "answer": "C"}
{"id": 189, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the density of the solution?\r\n\r\nA. 0.99906\r\nB. 0.99904\r\nC. 0.99901\r\nD. 0.99902", "answer": "A"}
{"id": 190, "question": "Create a solution at 15 degrees C with 5.0 mmol/kgw of C(-4). Set a gas phase at fixed pressure of 1.0, 15 degrees C, and 0 CH4(g).\r\n\r\nWhat is the ionic strength of the solution?\r\n\r\nA. 7.434e-08\r\nB. 7.436e-08\r\nC. 7.437e-08\r\nD. 7.433e-08", "answer": "A"}
{"id": 191, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the pH of the resulting solution?\r\n\r\nA. 6.486\r\nB. 6.483\r\nC. 6.481\r\nD. 6.489", "answer": "D"}
{"id": 193, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the specific conductance of the resulting solution?\r\n\r\nA. 2436\r\nB. 2432\r\nC. 2435\r\nD. 2429", "answer": "B"}
{"id": 194, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the viscosity of the resulting solution?\r\n\r\nA. 0.90897\r\nB. 0.90899\r\nC. 0.90893\r\nD. 0.90895", "answer": "D"}
{"id": 195, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nHow many moles of calcite precipitated out of solution?\r\n\r\nA. 8.039e-04\r\nB. 8.041e-04\r\nC. 8.047e-04\r\nD. 8.042e-04", "answer": "D"}
{"id": 196, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the molality of Ca+2 in the resulting solution?\r\n\r\nA. 3.863e-03\r\nB. 3.868e-03\r\nC. 3.866e-03\r\nD. 3.869e-03", "answer": "B"}
{"id": 197, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the activity of Cl- in the resulting solution?\r\n\r\nA. 3.574e-03\r\nB. 3.569e-03\r\nC. 3.571e-03\r\nD. 3.577e-03", "answer": "C"}
{"id": 198, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the saturation index of Anhydrite?\r\n\r\nA. -1.29\r\nB. -1.26\r\nC. -1.27\r\nD. -1.23", "answer": "C"}
{"id": 199, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the saturation index of Hexahydrite?\r\n\r\nA. -3.98\r\nB. -3.96\r\nC. -3.93\r\nD. -3.99", "answer": "A"}
{"id": 200, "question": "Initialize a solution at 25 degrees C, pH 8.0, with 50 ppm Ca, 12 ppm Mg, 20 ppm Na, 2 ppm K, 150 ppm Alkalinity, 40 ppm S(6), 15 ppm Cl. Using this solution. remove 50.0 moles of water and set equilibrium phases of calcite, gypsum, and halite with 0 moles of each present initially.\r\n\r\nWhat is the saturation index of Thenardite?\r\n\r\nA. -6.88\r\nB. -6.84\r\nC. -6.81\r\nD. -6.83", "answer": "B"}