A liquid, solid, or gas that dissolves another solid, liquid, or gaseous solute, resulting in a solution that is soluble in a certain volume of solvent at a specified temperature.
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19 views
Solving carbon black
I want to remove a layer of 2 mm thick carbon black on a copper bowl. I have tried different solvents, but the carbon seems to be very resistive.
Which formula solves carbon black without solving ...
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1answer
21 views
How to calculate mole fraction of each element in an ionic compound?
A solution is prepared by dissolving 518g of K2SO4 in a small amount f water and diluted it with water to a volume of 2.5L(calculate the mole fraction of water,K+,SO4-2)
I got that the mole fraction ...
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1answer
122 views
How can one find products when one knows the reagents?
I'm going to use an example (I could have used a different one);
On the document it is about the study of the chemical balance of an acid-basic solution.
The chemists have written the chemical ...
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1answer
40 views
Is it possible to estimate a substance's water solubility from data like the substance's partition coefficient, dissociation constants, etc.?
If it is possible, how would you estimate a compound's water solubility from data like its partition coefficient, $ \log P $, its dissociation constant, $pK_a $, its molar mass, etc.?
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16 views
Removing Epoxy Glue from a ceramic piezostack
I am going to stick a strain gauge to the side of an expanding piezocrystal using a basic 2 part epoxy glue. I am eventually also going to be sticking other things to it. Does anyone know a safe way ...
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1answer
66 views
How would you expect organic liquids to behave (details below)?
Organic liquids A, B, and C have densities of 0.690, 0.955 and 1.126 g/mL, respectively. A and C are low polarity solvents, while B is a highly polar solvent. If each were added to water separately, ...
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1answer
180 views
What is the exact definition of Salinity?
I am a bit unclear on the definition of salinity. I have always thought of it as simply total dissolved ions.
Wikipedia seems to agree "saltiness or dissolved salt content" but many other sources ...
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2answers
2k views
How do non-polar substances dissolve in non-polar solvents?
The case of polar solvents is clear to me - we get an attraction between opposite charges. However, how do non-polar substances dissolve in non-polar solvents? How could it be explained on a molecular ...
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2answers
597 views
Why does 9-fluorenone dissolve in hexane?
I know like dissolves like, but I am still unclear. 9-fluorenone has a polar C—O bond.
Is it because 9-fluorenone can only form London forces with other 9-fluorenone molecules and hexane can break ...
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0answers
135 views
Understanding dissolution of CO₂ in Selexol and Rectisol
I'm trying to understand pre-combusiton carbon capture processes as described in this presentation.
I'm told that solvents such as chilled methanol ($\small\ce{CH4O}$) and dimethyl ethers of ...
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2answers
1k views
Will alcohol or soap damage plastic or rubber?
I have read conflicting advice on various sites about the appropriate methods for cleaning plastic and rubber items, and would like to ask people who actually know what's going on what they would ...
5
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2answers
459 views
Why are alcohols with longer chains less polar?
In my self-study, I recently came across the following question:
"Choose the solute of each pair that would be more soluble in hexane ($\ce{C6H14}$). Explain your answer.
(a) $\ce{CH3(CH2)10OH}$ or ...
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1answer
81 views
How can I identify and neutralize the chemical leaching out of new nitrile gloves?
I have a few cases of brand-new, nitrile gloves of a type and vendor that used to be good. But apparently, the vendor has moved manufacturing to a different country and outsourced customer service to ...
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2answers
499 views
What type(s) of gloves are effective against DCM and acetone?
I know that standard latex and nitrile gloves don't stop common organic solvents such as DCM and acetone. However, I was reading a Reddit thread and there were comments that if you are coming into ...
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1answer
213 views
How would I calculate the Normality of a 0.00167 molar solution of $\ce{KIO3}$?
I need a 0.01 N solution of KIO3 to use as a standard in a Winkler titration. The protocol that I am using specifies that this is 0.3567 g L-1, which I have calculated to be 0.00167 M based on 214 g ...
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1answer
412 views
What organic solvents are suitable to use with potassium permanganate?
I'm attempting to oxidize a substance with potassium permanganate and I was wondering what organic solvents I have at my disposal. The compound is soluble in chloroform and ethanol, but obviously ...
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1answer
110 views
Why do biphasic systems of fluorous and organic solvents form?
It's possible to select a perfluorinated hydrocarbon that is immiscible in another organic solvent, forming a distinct phase boundary. Such systems may become miscible at elevated temperature which is ...
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1answer
582 views
Are there endothermic dissolution reactions? [closed]
Are there reactions like
$X(s) + n Y(l) \to X \centerdot Y_n(l)$
that are endothermic? What are X and Y then?
The material X should also be soluble to material Y.
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4answers
2k views
What is the difference between melting and dissolving?
What is the difference between melting and dissolving? I am looking some general features.
The answer should be adaptable to the melting/dissolving of ice cube (water) in a class of pure alcohol ...
6
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1answer
155 views
What dictates the lifetime of a solvated electron in a given solvent?
Solvated electrons have a long lifetime in ammonia solutions, but their counterparts in water (called hydrated electrons) have a much smaller lifetime, of the order of microseconds in very pure water.
...
21
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2answers
503 views
How does chloroform degrade nitrile gloves?
Many of us have experienced the failure of nitrile gloves when exposed to chloroform. What's going on at a mechanistic level when this occurs?
I would guess that the chloroform dissolves some of the ...
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1answer
224 views
Are there any general rules for choosing solvents for recrystallization?
Recrystallization is a nice way of purifying a product, but choosing a suitable solvent if you can't rely on the literature seems like a lot of trial-and-error.
Are there any general rules on which ...
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2answers
138 views
Polypropylene 55 gallon drum
Can a polypropylene 55 gallon drum previously filled with chemicals used in the chrome plating process (possibly Nickel Sulfate) ever really be "cleaned out" for re-use? Can polypropylene ever absorb ...
