instruction stringlengths 15 21.8k |
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According to Wikipedia 4-methyl-1-pentanol is $\ce{C_6H_{14}O}$.
But here is what I got, which is slightly different.
Methyl = Think of methyl group, which is $\ce{CH_3}$.
Pentanol = Penta means we have 5 carbons, $-ane$ ending means we have $2n+2$ hydrogens, i.e. 12 hydrogens and $-ol$ ending means we have a ... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b\rightarrow\infty}ib\mathrm{K}_{eb}=\infty,... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b\rightarrow\infty}ib\mathrm{K}_{eb}=\infty,... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b\rightarrow\infty}ib\mathrm{K}_{eb}=\infty,... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
The flaw in your reasoning is that the molality $b$ cannot be infinite even if you `use a solute molality that is so big that the solution would be something like the pure solute`. Take water as an example:
How concentrated is water? Very concentrated you may say - but the concentration is limited. We know that one mo... |
The flaw in your reasoning is that the molality $b$ cannot be infinite even if you `use a solute molality that is so big that the solution would be something like the pure solute`. Take water as an example:
How concentrated is water? Very concentrated you may say - but the concentration is limited. We know that one mo... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
The flaw in your reasoning is that the molality $b = n(\text{solute})/m(\text{solvent})$ cannot be infinite even if you `use a solute molality that is so big that the solution would be something like the pure solute`. Take water as an example:
How concentrated is water? Very concentrated you may say - but the concentr... |
The flaw in your reasoning is that the molality $b = n(\text{solute})/m(\text{solvent})$ cannot be infinite even if you `use a solute molality that is so big that the solution would be something like the pure solute`. Take water as an example:
How concentrated is water? Very concentrated you may say - but the concentr... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
The inert pair effect describes the preference of late $p$-block elements (elements of the 3rd to 6th main group, starting from the 4th period but getting really important for elements from the 6th period onward) to form ions whose oxidation state is 2 less than the group valency.
So much for the phenomenological pa... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
Most combustion happened in the manner that fuels burn in oxidant. But there seems no reason that it cannot happened in opposite way. Are the experiment that oxygen burns in hydrogen? Or some oxidant in solid state(like KMnO4,KClO3,...) burns in reductive gas? |
Could you be more clear on what 'burning **in**' something means? The chemical reactions require both reactants available, so they need to mix - in what sense is Hydrogen mixing and reacting with Oxygen any different that Oxygen mixing and reacting with Hydrogen?
In some sense, we do tend to control these reactions ... |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
I have a solution of potassium dichromate ($\ce{K2Cr2O7}$) and I want to convert it to a less toxic solution. What would be the best way to do this?
I was thinking of using the dissolved potassium dichromate as an oxidizer in the oxidation of alcohols to organic acids, to eventually produce the chromium(+III) ion (... |
Most combustion happens involves the fuels burning in an oxidant. But there seems to be no reason that it cannot happen in the opposite way. Are there any experiments on oxygen burning in hydrogen? Or some oxidant in solid state (like $\ce{KMnO4,KClO3,}$...) burning in a reductive gas? |
This is the boiling-point elevation equation:
$$
\Delta\mathrm{T}_{b}=ib\mathrm{K}_{eb}.
$$
If we do the limit of the above, for $b\rightarrow\infty$ we find that the boiling-point elevation is infinite. How this could be explained under a physical view?
$$
\lim_{b~\rightarrow~\infty}ib\mathrm{K}_{eb}=\inft... |
For a very large-scale project, I am trying to create a greenhouse gas demonstration device, which rapidly produces greenhouse gases from atmospheric air using only electricity, or any chemical reactions or chains of chemical reactions that can attain their input energy from electricity. At the intake would be a very p... |
I've managed to write down the correct reaction (I think):
$H_2O_2+KI+H_2SO_4 \longrightarrow K_2SO_4+I_2+H_2O$
Now I need to balance this using the Ion-Electron method in an acidic environment.
Normally this is no problem, but I'm a bit confused on how to work with the reduction of $O$ from $-I$ to $-II$ and I'... |
Redox reaction with H2O2+KI+H2SO4 ->? |
I've managed to write down the correct reaction (I think):
$$\ce{H2O2 + KI + H2SO4 -> K2SO4 + I2 + H2O}$$
Now I need to balance this using the Ion-Electron method in an acidic environment.
Normally this is no problem, but I'm a bit confused on how to work with the reduction of $\ce{O}$ from $\ce{-I}$ to $\ce{-II... |
If I mix a 2M Solution with a different 1M solution, do the individual solutions reduce in molarity to 1.33M and 0.33M respectively?
|
> Are there any experiments on oxygen burning in hydrogen?
(Assuming that burning *in* "something" describes that "something" is more/at higher concentration than the stuff that is said to burn)
Sure oxygen burns *in* hydrogen: the upper flammable limit of hydrogen in oxygen is 94 % hydrogen and 6 % oxygen.
Wh... |
I'm reviewing for my AP Chem acid-base equilibrium test, and I'm working problems out of the book, I have a problem that asks: "Predict the products of the following acid-base reactions, and predict whether the equilibrium lies to the left or to the right of the equation.
One of the problems is
$\ce{NO2-}+\ce{H2... |
Note that being a chemist doesn't require any kind of state license or the like in Germany, neither.
But buying dangerous\* substances and running a chemical lab requires that you\*\* have certain licenses and implement safety standards.
Some of these exams a chemist has to pass during studies (e.g. on toxicology... |
That question doesn't make any sense.
You have a nitrite ion and water.
And suddenly you add an oxygen, get nitrate, and have nitric acid and hydroxide ions in solution.
Can you check again? |
Multiple-chamber artillery can launch a projectile with energies much higher than single-chamber guns. I'm interested in setting a fundamental upper bound on the energy that a chamber (of a known volume) can impart to a projectile. This would, for example, set [a limit on the needed volume for a sub-orbital gun][1] (... |
Why does gold react with cyanide and sodium hydroxide and what is the chemical reaction's impact on gold's atomic structure and bonding?
What I think is since in the 'flotation' process, when the water, chemicals and other substances are added, gold isn't affected and neither is the pyrite, but when the cyanide and ... |
I've managed to write down the correct reaction (I think):
$\ce{H2O2 + KI + H2SO4 -> K2SO4 + I2 + H2O}$
Now I need to balance this using the Ion-Electron method in an acidic environment.
Normally this is no problem, but I'm a bit confused on how to work with the reduction of $\ce{O}$ from $\ce{-I}$ to $\ce{-II}$... |
Is there a general way to predict products of a chemical reaction, given only the atomic masses of masses of all elements involved? for example:
1) $CuFeS_2+ O_2-----$
2)$K_2CrO_4+H_2SO_4-----$
3)$FeOCr_2O_3+K_2CO_3+O_2----$
4)$K_2Cr_2O_7+H_2SO_4------$
If there's no method to do so, are we supposed to m... |
Is there a general way to predict products of a chemical reaction, given only the atomic masses of masses of all elements involved? for example:
1)$\ce{CuFeS2 + O2->}$
2)$\ce{K2CrO4 + H2SO4->}$
3)$\ce{FeOCr2O3 + K2CO3 + O2->}$
4)$\ce{K2Cr2O7 + H2SO4->}$
If there's no method to do so, are we supposed to m... |
"All substitution reactions of benzene must be carried out in dry conditions with a catalyst that produces a powerful electrophile"
This was a statement from my book. My question is that why must it be carried out in DRY CONDITIONS? What will occur if moisture is present?
|
>"All substitution reactions of benzene must be carried out in dry conditions with a catalyst that produces a powerful electrophile"
This was a statement from my book. My question is that why must it be carried out in ***dry conditions***?
What will occur if moisture is present?
|
>All substitution reactions of benzene must be carried out in dry conditions with a catalyst that produces a powerful electrophile.
This was a statement from my book. My question is, why must it be carried out in ***dry conditions***?
What will occur if moisture is present?
|
Boyle's Law states that:
Pressure is inversely propotional to Volume.
But if we take an example of a balloon. As we fill air in it it's pressure increases but it's volume also increases.
<img src="http://chemwiki.ucdavis.edu/@api/deki/files/8673/Red_Balloon_Effusion.JPG?size=bestfit&width=350&height=209&revisio... |
What is Mechanism Reduction Using red P and Iodine? |
Could anybody describe me wich is the formula of the product of o-toluidine oxydation in this reaction:
hydrogen peroxide+ o-toluidine(chromogen not colour)-peroxidase enzyme->1mole of water+1/2 mole oxygen + o-toluidine oxydate( colour)?
note:hydrogen peroxide is one of the product of glucose oxydation to glucolac... |
By compressing $\ce{CO2 (g)}$ the gas gains a lot of heat. If that is left to cool, it will become so cold that it instantly freezes (dry ice) when released into normal pressure at 1 atm.
How much pressure is needed to make dry ice at 293K (20 degrees celcius)? |
How much pressure is needed to make dry ice? |
We know that an activation complex is the temporary unstable compound formed when activation energy is reached. But what dictates whether the products are indeed going to be products or if they become reactants? Does the activation complex form when orientation is both correct and incorrect, and only forms products whe... |
Isn't that a bit different?
At 293 K, you need about 56 bar to liquefy carbon dioxide. If you then release the pressure, a part of the liquid evaporates again while cooling down the rest until it solidifies at around -80 °C.
|
By compressing $\ce{CO2 (g)}$ the gas gains a lot of heat. When the hot compressed carbon dioxide is left to cool, it attains the temperature of the surrounding material. When it is released into the pressure outside (about 100kPa), it will get so cold (actual temperature depending on how much the carbon dioxide was co... |
Imagine some $S_N2$ reaction involving an aliphatic $sp^3$ carbon with a halide leaving group (e.g. Iodide or Bromide). Given the rise of femtosecond spectroscopy (e.g. using a mode-locked Ti:sapphire laser) and even attosecond spectroscopy, I'm curious if there are any studies that have measured the properties and ap... |
Does benzene have both isomers and resonance structures?
I know that it has resonance structures because you can manipulate the position of the double bonds but what about isomers? |
Does benzene have isomers and resonance structures? |
When do I use each of the above? If I use one or the other they give me difference results.
For example, I'm trying to put the Volts into an equation to find standard free energy change.
$$\Delta G^\circ= -nFE$$
If I use the cathode minus anode I get a different answer to the oxide + reduct.
Thanks in ad... |
When do I use each of the above? If I use one or the other they give me difference results.
For example, I'm trying to put the Volts into an equation to find standard free energy change.
$$\Delta G^\circ= -nFE$$
If I use the cathode minus anode I get a different answer to the oxidation + reduction.
Thank... |
I have to do a lab about enzyme catalysis with Peroxidase in my Chemistry class. We are to use the blank control solution in the experiment. My question is, why can we not use water instead? I did some research about this and someone says something like "It is because the water blank absorbs so much light that the usab... |
Why can we not use water instead of blank control solution in enzyme catalysis with Peroxidase experiment? |
I am trying to make a solution of "trace elements"--primarily transition metals-- for use in biological media; bacteria require elements like Cobalt, Molybdenum, iron, etc. in trace amounts. I am not a chemist, but my understanding is that these elements tend to form hydroxides in physiological pH ranges (slightly abov... |
Is it conceivable that the white precipitate is $\ce{Zn(OH)2}$? Usually it precipitates more jelly-like, but anyway...
It will however dissolve both on lowering the pH, forming colourless $\ce{[Zn(H2O)6]^{2+}}$ and on increasing the pH, yielding the likewise colourless $\ce{[Zn(OH)4]^{2-}}$. |
Could anybody describe which product is formed in the following reaction (o-Toluidine oxidation)?
$$\ce{H2O2 + o-Toluidine_{uncolored} - Peroxidase -> H2O + 1/2 O2 + o-Toluidine\; Oxidate_{colored}} $$
**Note**: Hydrogen peroxide is one of the products of glucose oxidation to glucolactone by glucose oxydase. |
Quoting from this site: http://chemwiki.ucdavis.edu/Organic_Chemistry/Organic_Chemistry_With_a_Biological_Emphasis/Chapter__4%3A_Structure_Determination_I/Section_4.3%3A_Ultraviolet_and_visible_spectroscopy
"As conjugated pi systems become larger, the energy gap for a π - π* transition becomes increasingly narrow, ... |
Why does the energy gap for π - π* transitions shrink with the size of the pi-conjugated system? |
Quoting from [this site][1]:
>As conjugated pi systems become larger, the energy gap for a π - π* transition becomes increasingly narrow, and the wavelength of light absorbed correspondingly becomes longer. The absorbance due to the π - π* transition in 1,3,5-hexatriene, for example, occurs at 258 nm, correspondi... |
Quoting from [this site][1]:
>As conjugated pi systems become larger, the energy gap for a π - π* transition becomes increasingly narrow, and the wavelength of light absorbed correspondingly becomes longer. The absorbance due to the π - π* transition in 1,3,5-hexatriene, for example, occurs at 258 nm, correspondi... |
Quoting from [this site][1]:
>As conjugated pi systems become larger, the energy gap for a π - π* transition becomes increasingly narrow, and the wavelength of light absorbed correspondingly becomes longer. The absorbance due to the π - π* transition in 1,3,5-hexatriene, for example, occurs at 258 nm, correspondi... |
----------
Both processes involved the denaturation of proteins and complex reactions so is impossible reverse them **only** with a change of temperature.
----------
#Boiling an Egg
Although in most case denaturation is not reversible there are some cases where it is.
However in the case of Egg white... |
Klaus Warzecha's answer pretty much answers your question. But I know that this subject is easier to understand if supported by some pictures. That's why I will take the same route as Klaus at explaining the concept behind why the absorption in conjugated systems is shifted to higher wavelengths but I will provide some... |
Are you sure that the R and S are in the mol file and not part of the xml envelope?
Stereochemical *R* and *S* descriptors would not make any sense for a molecule like anthracene!
Is it conceivable that the letters come from **Risk and Safety** statements?
It would be helpful if you could upload the original ... |
In our chemistry practical we dropped 0.07g of Magnesium into various concentrations of an acid (sulfuric or hydrochloric - only one was used, not sure which), and measured the rate of reaction by the rate of the H2 produced (used a gas syringe). We then collected data at a suitable interval of the culmulative amount o... |
Take a look at the emission spectrum for an arbitrary fluorescent dye: http://en.wikipedia.org/wiki/File:Fluorescein_spectra.jpg
Does the emission spectrum depend on exciting the dye at its peak absorbance wavelength $\lambda_{max}$? Consider that there is going to be a spread of eigenstates around a particular exc... |
Does the emission spectrum for a dye depend on the frequency of light used to excite the dye? |
Take a look at the emission spectrum for an arbitrary fluorescent dye: http://en.wikipedia.org/wiki/File:Fluorescein_spectra.jpg
Does the emission spectrum depend on exciting the dye at its peak absorbance wavelength $\lambda_{max}$? Consider that there is going to be a spread of eigenstates around a particular exc... |
> Does the emission spectrum depend on exciting the dye at its peak absorbance wavelength $\lambda_{max}$?
No, it is independent of that. The excitation $S_0 \rightarrow S_1$ is vertical, bond length are not changed in the excitation process. Compare the mass of the nuclei with that of the electrons and you know wh... |
Just out of curiosity, can dust conduct electricity? The source of dust varies, is there any form of dust that can conduct electricity? |
Can dust conduct electricity? |
I asked a question previously about "why" it is the case the expanding the size of pi-conjugated systems decreases the required energy to excite an electron from a HOMO to a LUMO band: http://chemistry.stackexchange.com/questions/8910/why-does-the-energy-gap-for-transitions-shrink-with-the-size-of-the-pi-co. The user ... |
I asked a question previously about "why" it is the case the expanding the size of pi-conjugated systems decreases the required energy to excite an electron from a HOMO to a LUMO band: http://chemistry.stackexchange.com/questions/8910/why-does-the-energy-gap-for-transitions-shrink-with-the-size-of-the-pi-co. The user ... |
I asked a question previously about "why" it is the case the expanding the size of pi-conjugated systems decreases the required energy to excite an electron from a HOMO to a LUMO band: http://chemistry.stackexchange.com/questions/8910/why-does-the-energy-gap-for-transitions-shrink-with-the-size-of-the-pi-co. The user ... |
Are you sure that the R and S are in the mol file and not part of the xml envelope?
Stereochemical *R* and *S* descriptors would not make any sense for a molecule like anthracene!
Is it conceivable that the letters come from **Risk and Safety** statements?
It would be helpful if you could upload the original ... |
The answer to this question hinges on two key questions:
1. What kind of dust are we dealing with?
2. How is the dust arranged (i.e. what is your experimental setup)?
Which Dust?
--
Firstly, I'm going to assume you meant domestic dust (since there are more kinds of dust than you'd imagine).
I quote [Wiki... |
Are you sure that the R and S are in the mol file and not part of the xml envelope?
Stereochemical *R* and *S* descriptors would not make any sense for a molecule like anthracene!
Is it conceivable that the letters come from **Risk and Safety** statements?
It would be helpful if you could upload the original ... |
I've read that radioactive compounds are dangerous because they emit electromagnetic waves (gamma-radiation, ...),.. that are dangerous for living organisms because they can ionize atoms in molecules.
So if one water molecule is ionized by using radioactive waves, would you then get:
$\ce{H2O -> H^+ + OH^-}$
or ... |
Why do we only consider the $pK_a$ value of a drug regardless of whether it is an acid or base? Why do we not use the $pK_b$ value?
|
What is the importance of using a pka value instead of a pkb value when describing drug chemistry? |
First, a bit of background on radiation (or at least the most common types. [There are many ways nuclei can decay][1]).
Depending how far the radiation source is from you, gamma radiation is either the least or the most dangerous type of nuclear decay. If the radiation is coming from well outside your body, then the... |
First, a bit of background on radiation (or at least the most common types. [There are many ways nuclei can decay][1]).
Depending how far the radiation source is from you, gamma radiation is either the least or the most dangerous type of nuclear decay. If the radiation is coming from well outside your body, then the... |
First, a bit of background on radiation (or at least the most common types. [There are many ways nuclei can decay][1]).
Depending how far the radiation source is from you, gamma radiation is either the least or the most dangerous type of nuclear decay. If the radiation is coming from well outside your body, then the... |
I need help with this one homework question. I am combining 100 mL of .500 M HCl and .5 M NaOH to make 200 mL of .25 M NaCl. The change in temperature of this reaction was $\Delta 3.38^OC$. I have to calculate the heat of reaction for 1 mole of the reactant. I also need to calculate the $C_{total}$ of this reaction. Ho... |
I have a bunch of conceptual questions about reaction rates. I intuitively get the factors that influence reaction rate - concentration, temperature, reactivity of reactants, etc. But when it comes to the formulas some things don't click, namely the following questions.
First - what is the chemistry behind why react... |
The question simply says "calculate the temperature of hot air in kelvin" on a data calculation section for this lab. We recorded:
volume change on cooling = 170 mL
original volume of hot air = 20 mL
volume of the cooled air = 150 mL
temperature of heated water = 100 C
temperature of cool water = 20.4 C
and that ... |
The question simply says "calculate the temperature of hot air in kelvin" on a data calculation section for this lab. We recorded:
- volume change on cooling = 170 mL
- original volume of hot air = 20 mL
- volume of the cooled air = 150 mL
- temperature of heated water = 100 C
- temperature of cool water = 20.4 ... |
What are some pharmaceutics that use vanillin? Is vanillin just an aroma and taste agent to pharmaceutics? |
What are pharmaceutical uses for Vanillin or C8H8O3? |
> I know that the best source of lye is hardwood.
Is that really so?
In *THE SODIUM, POTASSIUM AND PHOSPHORUS CONTENTS OF TREE SPECIES GROWN IN CLOSE STANDS*, published in *New Phytologist*, **1958**, *57(3)*, 273–284 ([DOI][1]), J. D. Ovington and H. A. I. Madgwick state:
>[...] In nearly all cases, conifers ... |
To my knowledge, vanillin nowadays does not have any pharmaceutical uses.
But according to Elisabeth Vaupel in *Pharmazeutische Zeitung online*, **2002**, 38 ([SRC][2]), [Michael Bernhard Valentini][1] wrote 1714 in his book *Museum Museorum, oder vollständige Schau-Bühne aller Materialien und Specereyen, nebst ... |
To my knowledge, vanillin nowadays does not have any pharmaceutical uses.
But according to Elisabeth Vaupel in *Pharmazeutische Zeitung online*, **2002**, 38 ([SRC][2]), [Michael Bernhard Valentini][1] wrote 1714 in his book *Museum Museorum, oder vollständige Schau-Bühne aller Materialien und Specereyen, nebst dere... |
What are pharmaceutical uses for Vanillin? |
To my knowledge, vanillin nowadays does not have any pharmaceutical uses.
But according to Elisabeth Vaupel in *Pharmazeutische Zeitung online*, **2002**, 38 ([SRC][2]), [Michael Bernhard Valentini][1] wrote 1714 in his book *Museum Museorum, oder vollständige Schau-Bühne aller Materialien und Specereyen, nebst dere... |
Water, when hit by radioactive particles, will most likely suffer ionization (or [radiolysis][1]). The ejected electron very quickly leaves the vicinity of the affected molecules (in the case of exposure to gamma or beta radiation) or a very chemically stable neutral helium atom is formed (in the case of exposure to al... |
$\ce{NaOH -> Na^+ + OH^-}\ \ \ \ \Delta H ^o = -44.51 \ kJ/mol$
The dissolution of sodium hydroxide in water is an exothermic process, and so, according to Le Chatelier's principle, cooling the container should shift the reaction to the right. Shouldn't this mean that cooling the container will increase the solubil... |
Water, when hit by radioactive particles, will most likely suffer ionization (or [radiolysis][1]). The ejected electron very quickly leaves the vicinity of the affected molecules (in the case of exposure to gamma or beta radiation) or a very chemically stable neutral helium atom is formed (in the case of exposure to al... |
Is it due to the aldol reaction that happens? But the product of that reaction is still soluble in acetone.
Apparently if you have a solid mixture of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexanone with NaOH and Na2CO3 impurites, and you dissolve them in acetone, after which you centrifuge, the solid impurites will s... |
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