Questions tagged [solvents]

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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26 views

In situ preparation of Potassium Tert-Butoxide

I am attempting to prepare potassium tert-butoxide. I was going to suspend anhydrous toluene and anhydrous tert-butanol, dissolve (reflux) the potassium metal (pure), then distill the excess tert-...
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Is it possible, at room temperature, to precipitate from their hydroxide salts elements that react with water?

What solvent could I use for displacement reactions whereby more reactive elements would be used in their elemental form to displace less reactive elements from their hydroxide salts (including for ...
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Investigating the effect of solvents on the alkaline hydrolysis of ethyl acetate

In the following reaction, I believe a polar aprotic solvent like propanone will be more favorable since the partial negative charge on the oxygen atom in propanone will attract the sodium ion from ...
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Investigating the effect of solvents (protic vs aprotic) on the alkaline hydrolysis of ethyl acetate using a conductivity meter

What different areas about solvents can be explored with the conductivities collected of the alkaline hydrolysis of ethyl acetate in propanone and ethanol? $$\ce{CH3COOC2H5 + NaOH -> CH3COONa + ...
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What chemical could dissolve low-density polyethylene?

What chemical could dissolve plastic aside from acetone? Preferably, low-cost and environmentally friendly. Any suggestions would be helpful. I'm targeting for thin plastic (low-density polyethylene)....
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Is sodium acrylate soluble in ethanol?

I am trying to make sodium acrylate by neutralizing acrylic acid with sodium hydroxide. I further want to photo-pattern it, which requires the addition of photoinitiator to sodium acrylate. The ...
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1answer
31 views

Calculating amount of base needed to achieve a specific pH in a mixed ethanol-water solvent

I'm looking for some way to calculate how much base I will need to add to an unbuffered solvent consisting of a mixture of ethanol and water in order to basify it to a specific reading (10) on an a pH ...
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54 views

Polar Protic and Aprotic Solvents

I know $\mathrm{S_N2}$ is favored polar aprotic solvents, which means that they may have hydrogens on them somewhere, but they lack $\ce{O-H}$ or $\ce{N-H}$ bonds, and therefore cannot hydrogen bond ...
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59 views

What is dielectric constant and how does it explain the reason why water is one of the best solvents

When i was reading solublity of ionic compounds,they mentioned that polar compunds are fairly soluble in polar solvents and water is better solvent due its high dielectric constant.Can anybody explain ...
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89 views

Does ethanol “decompose” or “remove” phosgene from chloroform?

A question I was asked was: "Why is ethanol added to chloroform bottles?". I know that chloroform can be slowly converted to poisonous phosgene gas, and that ethanol is added to prevent phosgene ...
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How good is 2-Butoxyethanol as a replacement for acetone?

I have recently bought a bottle of acetone from my local hardware store. When I opened the bottle, I was surprised about the absence of the strong smell of acetone. Only then I discovered the smaller ...
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How do I remove traces of denatured alcohol?

Accidentally cleaned nylon plastic with denatured alcohol. What is the best way to insure I've removed all traces of it? btw, I'm not a chemist so if you could dumb-down your answer that would be ...
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Qualitative Comparisons of Dielectric Constants of Organic Solvents

This question is inspired by the discussion around this earlier question. It is relatively simple to do a qualitative comparison of the polarities of different molecules (for example by analyzing the ...
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Acetic Acid type of solvent

I want to ask a question about polar/non-polar (a)protic solvents. The following information was given to me in the lecture hall today regarding solvents in organic chemistry. I recall the ...
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1answer
54 views

What polymer can be dissolved in ethanol and is insoluble in water?

I need a polymer with parameters noted above. How to determine the solubility theoretically? Hansen/Hildebrand solubility parameters? Wypych is not the ultimate solution...
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How to effectively get rid of 2-propanol acetate vapors and smell

I need to get rid of 2-propanol acetate vapors and its smell and need some chemistry help. Some possibilities I came up with: soap and water to rinse surfaces because soap might help increase its ...
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Is there a quantitative test/analysis technique that can determine if some chloroform has degraded into phosgene?

Before I go to use any chemical that I've had in storage for a while, I try to check if it's degraded into something else (e.g.: checking the $\ce{H2O}$ content of $\ce{H2O2}$, checking for $\ce{H2O2}$...
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203 views

Proton NMR chemical shift of water peak in different solvents

Why does the water peak appear at different chemical shift values (ppm) in different solvents in proton NMR spectra? For example, the water peak in DMSO-d6 appears at nearly 3.33 ppm, but the same ...
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1answer
107 views

Solvent for tire rubber

I want to apply tire rubber on surfaces, for various reasons - including protection against water. I think of tire rubber, as it is so widely available - helping in reducing pollution (infinitesimally)...
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Why mixing water with ethanol produces heat energy? [closed]

Sorry if I'm asking something stupid but I'm trying to understand where this energy gets from. As far as I could find, it is not a reaction as both chemicals left unchanged, so it might have something ...
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What does it mean by 'the residue was taken up in solvent' in synthesis protocol?

The below is a synthetic protocol I need to perform: N-trifluoro acetoxy succinimide Synthesis Trifluoroacetic acid anhydride was added to N-hydroxysuccinimide at 0 °C. The reaction was ...
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50 views

How do I calculate the total volume when i mix 1000 kg of glucose with 5000 L of water

I want to know how to calculate the resulting volume when I mix 1000 kg of glucose into 5000 L of water. How does the calculation change if I'm mixing NaCl into the water, instead of glucose? Or ...
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175 views

Solubility of Iodine in Some Organic Solvents

The solubilities of iodine in $\ce{CCl4,n-Hex,Et2O,PhCH3}$ were given respectively as 19 g/kg, 13 g/kg, 337 g/kg, and 182 g/kg. These results puzzle me for the following reasons: 1) Iodine, being a ...
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57 views

Solvent for caffeine extraction [closed]

Can anybody please help me find a way to separate caffeine from coffee that uses a solvent other than DCM, ethyl acetate, or diethyl ether? This an experiment for science class, but I don't have ...
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Miscibility of Hexane and Ethanol (Anhydrous vs 96%)

In my lab, I mixed 8:2 (mass:mass) of Hexane:Ethanol (Hexane: 0 ppm of water content, ...
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What is the principle of “scrubbing” in liquid extraction or solvent extraction?

There are many steps in solvent extraction: Extraction Scrubbing Back extraction I understand the 1st and the 3rd. What is the principle of scrubbing? Is it just washing the organic phase? How ...
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51 views

Can a solute be physically filtered out of a solvent?

Suppose that I have a substance dissolved in water. I then pour the solution into a filter. The filter's pores are large enough to allow the passage of water, but not the passage of the substance. In ...
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44 views

Is there an inexpensive solvent I can use to dissolve thermal paste without scrubbing?

I'm removing large voltage regulators from circuit boards which are often coated with a generous amount of thermal grease. I've found that 70% isopropyl alcohol works great for softening this and ...
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59 views

Ethyl Acetate and other Solvents in a mixture: miscibility and stability

I was wondering about a heterogeneous solvent mixture containing multiple alcohols such as IPA, Ethanol, methanol etc. Would EtOAc (Ethyl Acetate) play nice in these mixtures at low volumes such as 1 ...
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40 views

Is it considered safe to sonicate with flammable solvents?

I use a sonicator at work in a cleaning process. It involves sonicating acetone, NMP, and IPA. We would like to move forward with other flammables as well. We currently do the work in a hood, but no ...
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64 views

How do you tell if a liquid will evaporate cleanly? [closed]

Background: I'm working on developing a process to extract compounds from plant material in order to place the medicinal compounds from plants into a small capsule, instead of having to take large ...
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63 views

Why are hydrogen-bonded compounds (such as NH3) excellent solvents for most lab reagents? [closed]

Hydrogen bonds are said to be one of the strongest molecular interactions in nature. Then why can most substances that interact through hydrogen bondig such as water and $\ce{NH3}$ able to dissolve a ...
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Do substances dissolved in a solvent oxidise? [closed]

If a substance is dissolved in a solvent does it still oxidise? Does it depend on weather the solvent can dissolve oxygen?
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172 views

Why is fluoride the most nucleophilic halide in aprotic solvents? [duplicate]

I am confused on the topic of electronegative nucleophiles, and polar aprotic solvents. From my understanding, the more electronegative a nucleophile is, the weaker of a nucleophile it will be, ...
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30 views

Suitable safe cleaning solution for aliphatic urethane

I am looking for a suitable cleaning solution for a sprayed on coating that is an acrylic aliphatic urethane. My end goal would ideally be something that can neutralize rust, whiten and brighten the ...
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Acids using different solvents [closed]

Many polar protic solvents exist and ionic compounds are able to dissolve inside these substances for the same reason as water. So, theoretically, if a substance were to steal a $H^+$ ion from a polar ...
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1answer
279 views

Why is hexane called skellysolve-B

https://pubchem.ncbi.nlm.nih.gov/compound/hexane Another name for hexane is skellysolve-B, is that just to be silly?
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376 views

What are solvents that can dissolve sebum that is safe for topical use? [closed]

I do not know much about these properties and I need some feedback regarding these. Sebum is a semi-fluid that in humans contains a mixture of triglyerides, cholesterol, ester waxes, and squalene. 57....
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214 views

Are there any fluids which are both viscous and volatile? [closed]

I'm looking for a viscous fluid which will evaporate (completely) rather quickly. If propylene glycol evaporated like acetone, that would be the dream ticket, but neither the viscosity nor the ...
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35 views

Deperoxidation of ethers via alumina: what happens?

I was reading about the procedures for the removal of peroxides from ethereal solvents, and a procedure which seems to have survived to our days is filtration through a column of "activated alumina" (...
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Why Benzene is a good solvent even while it is not polar

Consider for a moment, ether, THF, benzene and hexane. Why is the solubility of many organics in these solvents in the following order THF > ether / benzene > hexane What makes benzene a good ...
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51 views

How can I prevent the effervescence of a solvent during evaporation? [closed]

How can I prevent the effervescence of a solvent like petroleum ether when I evaporate it on a water bath?
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149 views

What is the proof of complete ionic dissociation in water?

Is there any way to prove that ionic compounds, for instance $\ce{NaCl}$, completely dissociate into singular $\ce{Na+}$ and $\ce{Cl-}$ ions within water by hard experimental evidence? Besides ...
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Cobalt Chloride in various solvent/water mixtures - tested

In a recent post the solvatochromic behaviour of cobalt chloride in acetone was discussed. There were some ideas how the acetone might influence the ratio between the blue $\ce{[CoCl4]^2-}$ and the ...
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1answer
590 views

Why any non polar compounds dissolve in nonpolar substance like Benzene what is the reason behind it? [duplicate]

In case of ionic solvent the ionic solute dissolve in it because due to polar nature of water it break the bond between the ions through hydration energy and the ionic solvent dissolve in it. So I ...
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111 views

what would happen if someone smell just a little chloroform? [closed]

I'm new in labratoary and a few days ago I smelled chloroform just for a second, out of curiosity. The next day I became very sick with symptoms like nausea, vomiting, fatigue and pain in my muscles. ...
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Nucleophilicity of halides in solvents [duplicate]

I have studied that as electronegativity increases nucleophilicity decreases. But in the aprotic solvent the order of nucleophilicty is: $$\ce{F- > Cl- > Br- > I-}$$ but how is this possible ...
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Will vegetable oil and kerosene mix?

Is it possible to mix vegetable oil with kerosene? If not, what other solvents can be used to reduce the viscosity of cooking oil/vegetable oil.
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297 views

is syringaldazine soluble in water?

Would it be better to use water or ethanol as a solvent for syringaldazine? Why? Would water interfere with the oxidation of syringaldazine if laccase enzyme was added?
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315 views

How can I solvent exchange from water to alcohol?

Given an aqueous colloidal solution, is there a way to transfer the colloidal particles into an alcohol (assuming the colloidal particles are also stable in the alcohol)? I see in the literature that ...