instruction stringlengths 15 21.8k |
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I cannot figure out a question on my review sheet. The full question is:
> Methane ($\ce{CH4}$) is a gas at room temperature but chloroform ($\ce{CH3Cl}$) is a liquid. Explain why changing just one $\ce{H}$ atom for a $\ce{Cl}$ atom changes the compound's state at room temp.
I thought about it, and I think it doe... |
Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative.
[The recipe was][1]:
1. Mix ingredients:
1. 400ml of water
2. 200mg of kitchen salt
3. 100ml of vinegar
4. juice squeezed from 3 lemons... |
Wikipedia has a thorough article on the benzodiazepines. Of course, it is written primarly from the pharmacological point of view; but there is also the "Chemistry" section, which includes the IUPAC name. The parent hydride for the compound class is named 1H-benzo[e][1,4]diazepine. I do not understand why it is benzo[... |
I am doing a school project which involves color changing based off of temperature, and I need a thermochromic dye that changes color at 32 degrees Fahrenheit. Does anyone know where I could find some or explain how it is made? |
Today I experimented with different solvents and solutes and was a bit surprised by one result. When I added ethanol to dilute sodium bicarbonate and tapped the test tube against my palm to mix it, I saw the mixture swirling, then it turned cloudy.
I don't understand why this happened -- as far as my understanding ... |
Why doesn't ethanol dissolve in sodium bicarbonate? |
In an aqueous solution of $\ce{NaOH}$ exposed to the atmosphere one can probably expect some degree of $$\ce{NaOH(aq) + CO2(g) -> NaHCO3 (aq)}$$
But, what would happen if just a solid block of $\ce{NaOH(s)}$ was placed in some completely anhydrous atmosphere, populated only by excess $\ce{CO2(g)}$ at STP? After all,... |
Does bicarbonation require water? |
In an aqueous solution of $\ce{NaOH}$ exposed to the atmosphere one can probably expect some degree of $$\ce{NaOH(aq) + CO2(g) -> NaHCO3 (aq)}$$
But, what would happen if just a solid block of $\ce{NaOH(s)}$ was placed in some completely anhydrous atmosphere, populated only by excess $\ce{CO2(g)}$ at STP? After all,... |
The activation energy is **not** the average kinetic energy that the colliding particles need in order to successfully react. Instead, it is the energy barrier between reactants and products. Often, the energy required to cross the barrier comes from the kinetic energy of collisions.
To describe the rate of a reacti... |
In an aqueous solution of $\ce{NaOH}$ exposed to the atmosphere one can probably expect some degree of $$\ce{NaOH(aq) + CO2(g) -> NaHCO3 (aq)}$$
But, what would happen if just a solid block of $\ce{NaOH(s)}$ was placed in some completely anhydrous environment, populated only by excess $\ce{CO2(g)}$ at STP? After all... |
I'm interested in software packages that can answer the following kind of question:
- If I mix 30mol% $N_2$ and 70mol% $H_2$ together at 2 bar and 2000C, what is the equilibrium composition after all reactions have reached equilibrium. Assume all reactants and products are ideal gases.
This is a relatively strai... |
Dissolving substances in water decreases water chemical potential.
As consequence, saturated water vapour pressure above the solution is lower than the pressure of vapours over pure water at the same temperature.
This leads to the higher boiling point of solution, compared to water, **at the same atmospheric pressure... |
Why is the 2nd ionization energy of chloride similar to that of sulfur? |
For a school project, about clean energy, me and my team are trying to build an iron battery.
----------
We are using a piece of iron (Anode), Potassium Hydroxide (Electrolyte), Carbon electrode (Cathode) arranged as below. As to generate electricity form the following chemical reactions:
1. $Fe+2OH^- \to Fe(... |
Can I reverse an iron redox reaction with potassium hydroxide and electricity? |
For a school project, about clean energy, me and my team are trying to build an iron battery. We are using a piece of iron (anode), potassium hydroxide (electrolyte), carbon electrode (cathode) arranged as shown below:
[![Iron Battery Diagram][1]][1]
As to generate electricity from the following chemical reaction... |
Sir Arthur7: From your comments you appear to know how to liberate CO<sub>2</sub> and a proton by pushing arrows as illustrated by the blue arrows in generic α-oxoacid **1**. You are correct in discrediting acyl anion **5** for two reasons. First, it is unstabilized and secondly, its protonation would provide an ... |
I am trying to estimate the redox potential of an excited state as described in [this reference][1].
The paper says:
>The reduction potentials associated with the excited states
cannot be directly measured and are typically calculated from
known cyclic voltammetry (CV) and spectroscopic data. As
an approximati... |
Electron affinity is the amount of energy "released" during the addition of an electron in the valence shell of an isolated gaseous atom. The sign convention is opposite to that of thermodynamics convention i.e. positive means release of energy.
For many non-metals, the first electron affinity is exothermic, i.e. po... |
Dissolving substances in water decreases water chemical potential
$$\mu=\frac {\mathrm{d}G} {\mathrm{d}n}$$
respectively activity $a$ :
$$\mu = \mu_9 + RT \ln {a}$$
As consequence, saturated water vapour pressure above the solution is lower than the saturate vapour pressure over pure water at the same temperatu... |
Sir Arthur7: From your comments you appear to know how to liberate CO<sub>2</sub> and a proton by pushing arrows as illustrated by the blue arrows in generic α-oxoacid **1**. You are correct in discrediting acyl anion **5** for two reasons. First, it is unstabilized and secondly, its protonation would provide an ... |
Aqueous sodium hydroxide is known to react with aluminum foil in an exothermic hydrogen-gas releasing reaction like
$$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$
However, on youtube, it looks like someone was able to substitute $\ce{NaOH}$ with $\ce{Na2CO3}$ and get a similar-looking reaction as wel... |
Aqueous sodium hydroxide is known to react with aluminum foil in an exothermic hydrogen-gas releasing reaction like
$$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$
However, on youtube, it looks like someone was able to substitute $\ce{NaOH}$ with $\ce{Na2CO3}$ and get a similar-looking reaction as wel... |
Aqueous sodium hydroxide is known to react with aluminum foil in an exothermic hydrogen-gas releasing reaction like $$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$
However, on youtube, it looks like someone was able to substitute NaOH with Na2CO3 and get a vigorous similar-looking reaction as well: h... |
Aqueous sodium hydroxide is known to react with aluminum foil in an exothermic hydrogen-gas releasing reaction like $$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$
However, on youtube, it looks like someone was able to substitute NaOH with Na2CO3 and get a vigorous similar-looking reaction as well: h... |
I am trying to reimplement the functionality of the classical program [ORTEP](https://ornl-ndav.github.io/ortep/ortep.html) for producing thermal ellipsoid plots of a crystal/molecule in a modern computer language. Unfortunately, I am having trouble finding usable sample files with the required thermal displacement par... |
Dissolving substances in water decreases water chemical potential
$$\mu=\frac {\mathrm{d}G} {\mathrm{d}n}$$
respectively activity $a$ :
$$\mu = \mu_9 + RT \ln {a}$$
As consequence, saturated water vapour pressure above the solution is lower than the saturate vapour pressure over pure water at the same temperatu... |
Aqueous sodium hydroxide is known to react with aluminum foil in [an exothermic, hydrogen-gas releasing reaction][1] like $$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$
However, on youtube, it looks like someone was able to substitute NaOH with Na2CO3 and get a vigorous similar-looking reaction as w... |
Sir Arthur7: From your comments you appear to know how to liberate CO<sub>2</sub> and a proton by pushing arrows as illustrated by the blue arrows in generic α-oxoacid **1**. You are correct in discrediting acyl anion **5** for two reasons. First, it is unstabilized and secondly, its protonation would provide an ... |
I clean vinyl records with an ultrasonic record cleaning machine. Would propylene glycol be good to use as a surfactant in a 1 - 2 % concentration with distilled water? Would it harm the vinyl record? Thanks for your help. |
[The Charlie Brown's Thanksgiving episode](https://www.youtube.com/watch?v=5FyKxVJmsdE) of _Binging with Babish_ claims that the baking powder "lower[s] the temperature at which the Maillard reaction occurs." [Wikipedia](https://en.wikipedia.org/wiki/Maillard_reaction) doesn't quite back that up but says that the Mail... |
Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative.
[The recipe was][1]:
1. Mix ingredients:
1. 400ml of water
2. 200mg of kitchen salt
3. 100ml of vinegar
4. juice squeezed from 3 lemons... |
In the recent years, computational chemistry community has focused on Machine Learning algorithms to predict molecular properties. Unfortunately, many of the authors of such papers are not chemists, and hence, there are little explanation on chemical aspects of this type of works.
One well known problem is to predic... |
The question is to identify the most acidic hydrogen atom in the compound below:
$NC—CH₂—CH—CH₂—OH$
My teacher said that the $H$ connected to $O$ is the most acidic since $O$ is more electronegative than Carbon.
However, I see that the $H$ connected to the carbon adjacent to cyanide must be more acidic since the con... |
> Identify the most acidic hydrogen atom in the compound below:
> $$\ce{NC-CH2-CH2-CH2-OH}$$
My teacher said that the $\ce{H}$ connected to $\ce{O}$ is the most acidic since $\ce{O}$ is more electronegative than carbon.
However, I see that the $\ce{H}$ connected to the carbon adjacent to cyanide must be more a... |
Easy question to kick off my chemexchange membership!
I'm learning chemistry in my spare time, and fittingly for a video art project I'm doing, decided to try a simple inorganic(?) procedure to make some crimson flames.
My research lead me to believe that lithium methoxide works wonders for this, especially in so... |
I am trying to solve this question :
> Find the major product of the following reaction:
>[![enter image description here][1]][1]
Now we could either do electrophilic addition on the alkene or do dehydration of alcohol. These two different reaction pathways yield different products. So how do we decide whic... |
Which reaction occurs first in this question? |
I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another thing is I also dissolve PMMA powder in acetone for 15 minutes before the texture hardened. After that, I have to blend... |
How to dissolve PLA/PCL/PMMA? |
I am trying to solve this question:
> Find the major product of the following reaction:
> [![Reaction between hex‐5‐en‐1‐ol and sulfuric acid][1]][1]
Now we could either do electrophilic addition on the alkene or do dehydration of alcohol. These two different reaction pathways yield different products. So how... |
Which reaction occurs first when 5-hexen-1-ol reacts with sulfuric acid? |
I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another thing is I also dissolve PMMA powder in acetone for 15 minutes before the texture hardened. After that, I have to blend ... |
I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another thing is I also dissolve PMMA powder in acetone for 15 minutes before the texture hardened. After that, I have to blend ... |
For a school project, about clean energy, me and my team are trying to build an iron battery. We are using a piece of iron (anode), potassium hydroxide (electrolyte), carbon electrode (cathode) arranged as shown below:
[![Iron Battery Diagram][1]][1]
As to generate electricity from the following chemical reaction... |
For a school project, about clean energy, me and my team are trying to build an iron battery. We are using a piece of iron (anode), potassium hydroxide (electrolyte), carbon electrode (cathode) arranged as shown below:
[![Iron Battery Diagram][1]][1]
As to generate electricity from the following chemical reaction... |
I've recently been thinking back to an impromptu "experiment" I performed almost exactly 3 years ago. The setup was as follows:
> A concentrated solution of KMnO$_4$ was produced by dissolving 2 grams of
Condy's crystals in 250 ml of water. This was subsequently poured into
an Erlenmyer flask containing a strip of ... |
I've recently been thinking back to an impromptu "experiment" I performed almost exactly 3 years ago. The setup was as follows:
> A concentrated solution of KMnO$_4$ was produced by dissolving 2 grams of
Condy's crystals in 250 ml of water. This was subsequently poured into
an Erlenmyer flask containing a strip of ... |
Potassium permanganate solution tends to decompose with time, especially those which are not acidified. Just let an aqueous solution sit in a glass bottle and it will leave a brown film of tenacious manganese dioxide on the surface at room temperature. If water has any organic material, it will become brown and tap wat... |
I was asked to draw the perspective formula of
>$$\ce{(3R,4R)CH2=CH-CH(CH3)-CH(CH3)-CH2-CH3}$$
Then I had to assign priority between the two groups:
>$$\ce{-CH=CH2}$$
and
$$\ce{-CH(CH3)-CH2-CH3}$$
Actually, they are bonded to the same atoms until the end of the first group, but one of them should have priority over t... |
I am working on a project relating to-
https://en.m.wikipedia.org/wiki/Millennium_Prize_Problems
I wanted to list the effects of them being proved or disproved in different aspects of science and maths. It was fairly easy to find such results on physics and maths as the questions primarily come up from them however... |
Will Proving or Disproving of any of the following have effects on Chemistry in general? |
I am working on a project relating to-
https://en.m.wikipedia.org/wiki/Millennium_Prize_Problems
I wanted to list the effects of them being proved or disproved in different aspects of science and maths. It was fairly easy to find such results on physics and maths as the questions primarily come up from them however... |
I read that to test for the presence of phenol groups in an organic compound the aniline dye test can be performed. If the solution has phenol present it gives a red or orange precipitate to confirm the presence, however as a side note it was mentioned that this test is applicable for the detection of small quantities ... |
Which compounds react positively in the aniline dye test? |
I am working on a project relating to-
https://en.wikipedia.org/wiki/Millennium_Prize_Problems
I wanted to list the effects of them being proved or disproved in different aspects of science and maths. It was fairly easy to find such results on physics and maths as the questions primarily come up from them however I... |
Koopmans' theorem is a useful approach to calculate the global reactivity parameters from the HOMO-LUMO energies. My question is, does it apply to the open-shell systems where we get two sets of singly occupied (alpha and beta) HOMO-LUMO energies?
I am working on rare earth systems. Rare earth (RE) elements general... |
Im wondering why there is a current measured at a halfwave potential? According to my understanding at the halfwave potential of a diffusion controlled reduction or oxiation at an electrode, there is half of the current due to anodic and the other half of the current due to cathodic current. I assume that therefore the... |
why is there a net current at halfwave potential? |
It is well Known that to find $E_{cell}$ during titration of $Fe^{2+}$ with $Ce^{4+}$ we consider 3 domains:
Before Equivalance point , $E_+ = E_{Fe^{3+}/Fe^{2+}}^o+\frac{RT}{nF}log\frac{[Fe^{3+}]}{[Fe^{2+}]}$ ...........(1)
At Equivalance point , $E_+=\frac{E_{Fe^{3+}/Fe^{2+}}+E_{Ce^{4+}/Ce^{3+}}}{2}$........... |
Is there any theoretical way to estimate the activity of NaCl at high ionic strengths in water and that in 7 M LiCl solution? This question is based on whether solubility of NaCl in 7 M LiCl solution should decrease. Solubility of Na$^{+}$ in LiCl solution can be approximated to
$
[\mathrm{Na^{+}}]=\frac{(K_{sp})... |
Is there any theoretical way to estimate the activity of $\ce{NaCl}$ at high ionic strengths in water and that in $\pu{7 M}$ $\ce{NaCl}$ solution? This question is based on whether solubility of $\ce{NaCl}$ in $\pu{7 M}$ $\ce{LiCl}$ solution should decrease. Solubility of $\ce{Na+}$ in $\ce{LiCl}$ solution can be appr... |
Here is the question.
> Which one has better leaving group, cyclohexanol or cyclohexane that has $\ce{OH_{2}^{+}}$ substituent? Explain.
I know the answer is the latter because if both compounds are subjected in substitution reaction, the latter will yield a weak conjugate base ($\ce{H2O}$). There are some intere... |
Here is the question.
> Which one has better leaving group, cyclohexanol or cyclohexane that has $\ce{OH_{2}^{+}}$ substituent? Explain.
I know the answer is the latter because if both compounds are subjected in substitution reaction, the latter will yield a weak conjugate base ($\ce{H2O}$). There are some intere... |
It is rather:
$$\ce{2 Al + 6 H2O + 2 OH- -> 2 [Al(OH)4]^- + 3 H2 ^}$$where $\ce{OH-}$ comes either from hydroxide dissociation, either from carbonate hydrolysis.
$$\ce{CO3^2- + H2O <=> HCO3- + OH-}$$
The reaction with carbonate would gradually slow down as the carbonate/bicarbonate buffer will kick in.
Initial $\ma... |
It is rather:
$$\ce{2 Al + 6 H2O + 2 OH- -> 2 [Al(OH)4]^- + 3 H2 ^}$$where $\ce{OH-}$ comes either from hydroxide dissociation, either from carbonate hydrolysis.
$$\ce{CO3^2- + H2O <=> HCO3- + OH-}$$
The reaction with carbonate would gradually slow down as the carbonate/bicarbonate buffer will kick in.
Initial $\ma... |
It is well Known that to find $E_{cell}$ during titration of $Fe^{2+}$ with $Ce^{4+}$ we consider 3 domains:
Before Equivalance point , $E_+ = E_{Fe^{3+}/Fe^{2+}}^o+\frac{RT}{nF}log\frac{[Fe^{3+}]}{[Fe^{2+}]}$ ...........(1)
At Equivalance point , $E_+=\frac{E_{Fe^{3+}/Fe^{2+}}+E_{Ce^{4+}/Ce^{3+}}}{2}$........... |
It is an interesting question. Daniel Harris is revising his book with my former mentor. Hope he clarifies this section in the revised version. Your point number 1 is misleading. The reason is that before the titration, theoretically there is no Fe(III). So Nernst equation should not be used- electrode potential is inf... |
It is well Known that to find $E_{cell}$ during titration of $Fe^{2+}$ with $Ce^{4+}$ we consider 3 domains:
Before Equivalance point , $E_+ = E_{Fe^{3+}/Fe^{2+}}^o+\frac{RT}{nF}log\frac{[Fe^{3+}]}{[Fe^{2+}]} \tag{1}$
At Equivalance point , $E_+=\frac{E_{Fe^{3+}/Fe^{2+}}+E_{Ce^{4+}/Ce^{3+}}}{2} \tag{2}$
After... |
Why is absorption spectrum of beta-carotene different from Zeaxanthin? |
----------
# 1/ The iodine method:
----------
I found the answer on [this video][1] (from Cody's lab youtube channel). Cody's show how to make activated carbon/charcoal and how to test its efficiency.
It's quite an easy task. The test below measures the absorption's efficiency of your charcoal filter (ac... |
One of the solution guides to a question I was working on said that pressure and temperature is constant for a phase change. I understand why temperature is always constant for a phase change, but don't understand why pressure is. If the heat coming in and out of the system and the volume is changing, shouldn't the pre... |
I purchased a used digital camera online. When I received it in the mail it had a very strange sticky substance that looked like a thin film.
It resisted attempts at cleaning. Water, baking soda + vinegar, baking soda only, vinegar only and rubbing alcohol all did not resolve the issue. Only vigorous scrubbing kind ... |
I purchased a used digital camera online. When I received it in the mail it had a very strange sticky substance that looked like a thin film.
It resisted attempts at cleaning. Water, baking soda + vinegar, baking soda only, vinegar only and rubbing alcohol all did not resolve the issue. Only vigorous scrubbing kind ... |
I purchased a used digital camera online. When I received it in the mail it had a very strange sticky substance that looked like a thin film.
It resisted attempts at cleaning. Water, baking soda + vinegar, baking soda only, vinegar only and rubbing alcohol all did not resolve the issue. Only vigorous scrubbing kind ... |
The Bohr's postulate of quantisation of angular momentum can be written in a formula as
$mvr = nh/(2π)$
where m is mass of electron
v is its velocity
r is the radius of that shell
h is Plank's constant
So, I was wondering that if, I want to find where approximately the thing with $n=2$ exists, or in other words... |
The Bohr's postulate of quantisation of angular momentum can be written in a formula as
$mvr = nh/(2π)$
where $m$ is mass of electron
$v$ is its velocity
$r$ is the radius of that shell
$h$ is Plank's constant
So, I was wondering that if, I want to find where approximately the thing with $n=2$ exists... |
I purchased a used digital camera online. When I received it in the mail it had a very strange sticky substance that looked like a thin film.
It resisted attempts at cleaning. Water, baking soda + vinegar, baking soda only, vinegar only and rubbing alcohol all did not resolve the issue. Only vigorous scrubbing kind ... |
I recently started collecting shellac records, and got the idea of releasing my own music on 78rpm shellacs.
But the exact formulas and techniques for making shellac records seems pretty much lost to history, and it seems it was a very hard material to use anyway. You can use vinyl, but then it would not be playable... |
Is there a heatformed vinyl-like plastic that is hard as shellac when cold? |
I purchased a used Canon Powershot A1100 IS camera online. When I received it in the mail it had a very strange sticky substance that looked like a thin film.
It resisted attempts at cleaning. Water, water + soap, baking soda + vinegar, baking soda only, vinegar only and rubbing alcohol all did not resolve the issue... |
I purchased a used Canon Powershot A1100 IS camera online. When I received it in the mail it had a very strange sticky substance that looked like a thin film.
It resisted attempts at cleaning. Water, water + soap, baking soda + vinegar, baking soda only, vinegar only and rubbing alcohol all did not resolve the issue... |
I recently started collecting shellac records, and got the idea of releasing my own music on 78rpm shellacs.
But the exact formulas and techniques for making shellac records seems pretty much lost to history, and it seems it was a very hard material to use anyway. You can use vinyl, but then it would not be playable... |
I am preparing for an assessed practical experiment where an unknown precipitate must be identified. I know that precipitates are insoluble, and my textbook says they are considered to be solid with reference to the aqueous solution.
I want to test for carbonate, halide, sulfate, and nitrate anions in the precipit... |
Can classification techniques used for identifying solids be used to identify precipitates? |
One of the solution guides to a question I was working on said that pressure and temperature is constant for a phase change. I understand why temperature is always constant for a phase change, but don't understand why pressure is. If the heat coming in and out of the system and the volume is changing, shouldn't the pre... |
Bromination of an alkene in presence of water results in its mechanism in a cyclic bromonium ion and "afterwards $\ce{H2O}$ binds to the carbon atom surrounded by more electron donating groups."
This is what we learned in class and I couldn't understand why. Shouldn't an electron donating group decrease the "strength" ... |
Aqueous sodium hydroxide is known to react with aluminum foil in [an exothermic, hydrogen-gas releasing reaction like][1] $$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$
However, on youtube, it looks like someone was able to substitute NaOH with Na2CO3 and get a vigorous similar-looking reaction as w... |
There's an interesting article here - [Illustrating Atoms and Molecules][1] - that discusses atom colors:
> In 1865, the chemist August Hoffman gave a Friday Evening Discourse at London’s Royal Institution on the “Combining Power of Atoms.” In order to demonstrate chemical bonding of atoms, he drilled holes in croqu... |
I would like to make life lasting breast milk jewelry. I would need at least 5ml to make it. I've been doing a lot of research to get the best results, so far this questions are the result of more than a year trying to get the right answer. Would reverse osmosis remove each bacteria from it, allowing me to work with it... |
The vapor pressure of IPA at 2.4 degrees C is 1/4 that of its room temperature value ([ref][1]).
The viscosity of IPA also increases dramatically as temperature cools to ~0 ([ref][2]).
Could you simply conduct the evaporation with the same solution but in a colder environment? A normal household fridge should be ... |
I'd like to know if I could get micelles to pick up microplastics in water. I read that microplastics are sometimes charged, so can we make the lyophobic end to pick up microplastics, so that they can then be collected on the water surface and be easily disposed?
This is the idea I'm planning to pitch for a science fa... |
Is it possible to make micelles to pick up Microplastics from water? |
I'm stuck on questions asking whether a given chemical formula is a strong or weak electrolyte in an aqueous solution. I did some research online, but could not get a specific solution that I could readily comprehend.
My conception right now is that ionic compounds are strong electrolytes? But I have no idea when it... |
How to determine if a compound is a strong, weak, or non-electrolyte? |
It is well Known that to find $E_{cell}$ during titration of $Fe^{2+}$ with $Ce^{4+}$ we consider 3 domains:
Before Equivalance point , $E_+ = E_{Fe^{3+}/Fe^{2+}}^o+\frac{RT}{nF}log\frac{[Fe^{3+}]}{[Fe^{2+}]} \tag{1}$
At Equivalance point , $E_+=\frac{E_{Fe^{3+}/Fe^{2+}}+E_{Ce^{4+}/Ce^{3+}}}{2} \tag{2}$
Afte... |
I asked about my sophisticated water purification system for a generation ship on Worldbuilding Stack Exchange, and somebody mentioned this:
> If you're gonna go to all the trouble of distilling it, why not just
> have that be your only step?
And it is a good question. But, from my chemistry knowledge, this just... |
Will distillation do the job of purifying the water? |
K2CO3 doesn't boil - it thermally decomposes. However, I am finding conflicting information online about this. Roughly what I have found say three inconsistent things:
(1) It doesn't decompose
(2) At 1200c it decomposes into $\ce{K + O + CO}$
(3) At 1200c it decomposes into $\ce{K2O + CO2}$
Most sources agr... |
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