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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Why preform extraction with multiple small portions of solvent as opposed to one large portion

I'm preforming a liquid liquid extraction on a 1 Liter water sample for GC analysis. The procedure calls for 3 extractions with $50~mL$ of $\ce{CH2CL2}$. Would one extraction with $150~mL$ produce ...
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19 views

Does removing solution affect a supersaturated solution

Given a mixture of: a saturated solution of a solute in a solvent together with excess of the solute compound as crystalline material. If one were to change the bulk composition of the mixture by ...
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465 views

How to separate HCl and NaOH from salt and water solution?

I mean, how can we reverse the neutralization reaction of HCl and NaOH to get back HCl and NaOH. I want to extract HCl and NaOH from a mixture of common salt and distilled water in equal proportions ...
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71 views

Dry ice and acetone

In my organic chemistry class there are several reactions that I've been told are generally conducted at -78 C, which is apparently also the temperature of dry ice in acetone. This is all well and ...
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36 views

Ester as a solvent

I am curious as to why ester is used often as a solvent in organic chemistry? How is it different that just using water, which is also polar? I'm sorry if this is a basic question, I'm just a student. ...
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34 views

Are there any significant industrial processes that use liquid ammonia as a solvent?

There are some interesting laboratory reactions that use liquid ammonia as a solvent (for example, the Birch Reduction where an alkali metal is dissolved in liquid ammonia). There have also been some ...
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129 views

Storing chloroform

I'm going to be aliquoting out ethanol-stabilized chloroform into smaller containers. It's presently in a large bottle sealed with a rubber(y) sheet so I can only draw it out with a needle. My ...
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4k views

How to calculate molality, molarity and mole fraction given density (g/mole)?

Calculate the molality, molarity and mole fraction of a $\ce{CuSO4}$ in a 17% m/m aqueous solution (density of the solution is 1.367 g/mole) I did .17 * 1.367 to find grams of $\ce{CuSO4}$ and .83 * ...
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64 views

Absolute limits on solubility of immiscible solutes?

I know that for a particular, immiscible solute, there is a limit on how much of it can be dissolved in a solvent at a given temperature. However, I was wondering if there is only so much "total ...
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67 views

Solvated solids

I have a very basic question concerning solvation. If a solid (solute) was dissolved in a liquid (solvent), is the solute still in the solid state? or does it convert into another state of matter when ...
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67 views

Rotary Evaporator Cleaning

I am using a rotary evaporator ('rotovap') in my lab mainly with dichloromethane as a solvent. Usually between experiments I clean the receiving and boiling flasks with a brush using soap and water ...
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53 views

Removing part of a t-shirt print

I received a t-shirt that I ordered which seems to have a bit of the print color staining the shoulder. Is there some solvent that could be used to selectively remove that print stain without ...
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309 views

Solvation effect on cyclohexane

I ran molecular dynamics simulation with a molecule of methylcyclohexane soaked into a water box. On the other hand I ran Monte Carlo with the molecule alone (no soaking). I performed this for the ...
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43 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
537 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
78 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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37 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
105 views

How would you expect organic liquids to behave (details below)? [closed]

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
880 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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3answers
10k 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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2k 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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1answer
259 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
9k 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 ...
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1k 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
105 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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2k 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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430 views

How would I calculate the Normality of a 0.00167 molar solution of 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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1k 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
204 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
1k 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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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 ...
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1answer
396 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. ...
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886 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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552 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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219 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 ...