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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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24 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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0answers
6 views

Find the density of a solution. also converting solubility of solution (g/kg) to solubility (g/l) [on hold]

Q: Find the density of a solution,whilst converting solubility of solution (g/kg) to solubility (g/l) only having the density of the solute in its solid form is 1.35 g/cm3. I am currently designing a ...
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0answers
44 views

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 ...
6
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2answers
49 views

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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2answers
80 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 ...
3
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1answer
86 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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0answers
34 views

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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1answer
44 views

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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2answers
45 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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2answers
62 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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1answer
49 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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1answer
61 views

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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0answers
36 views

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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0answers
33 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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1answer
38 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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0answers
47 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 ...
2
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1answer
34 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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1answer
61 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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1answer
56 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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1answer
19 views

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?
4
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1answer
135 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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1answer
19 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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1answer
42 views

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 ...
2
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1answer
205 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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1answer
227 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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1answer
156 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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0answers
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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1answer
984 views

Why Benzene is a good solvent even while it is not polar [closed]

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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1answer
50 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?
8
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3answers
144 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 ...
8
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0answers
170 views

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 ...
3
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1answer
518 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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1answer
101 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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0answers
89 views

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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1answer
2k views

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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0answers
255 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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1answer
262 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 ...
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0answers
94 views

What is a good solvent for pentacene?

I am doing an experiment with pentacene molecule ($\ce{C22H14}$). I want to clean my sample reservoir after using it. But I show in some literature that it is slightly soluble in organic solvent. ...
4
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2answers
630 views

What is the function of nitrobenzene as a solvent in Friedel Crafts alkylation reaction?

I would like to know what is the function of nitrobenzene as a solvent in Friedel Crafts alkylation reaction. Answer to this question suggests that Friedel Crafts reaction is not possible with ...
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1answer
199 views

How do quaternary ammonium salts catalyse SN2 reactions?

I am asked to identify the "best catalyst" for the reaction: $$\ce{CH3(CH2)8CH2Br->[\ce{KCN}][\text{benzene}]CH3(CH2)8CH2CN}$$ The options are (A) benzyl chloride (B) aniline (C) N,N,N-...
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2answers
75 views

How to make dichloromethane human-friendly and safe for storage?

I use dichloromethane to polish 3D printed object as postprocessing step. Most of it is stored in darkened glass on my balcony (now at $\pu{-15^\circ C}$). What chemical reactions I need to make it ...
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1answer
89 views

Is it absolutely necessary to use centrifuge to separate ethylene glycol from precipitate?

I've been trying to synthesize intermetallics of $\ce{XY}$ type using transition metal salts and main group element salts. For my system, EG, DEG, and TEG are good solvents. However, because of them ...
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0answers
68 views

How to determine crown ether cavity size? [closed]

I want to determine the cavity radius/ dia of crown ether. Which technique should I follow?
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2answers
1k views

Is polylactic acid (PLA) soluble in ethylacetate?

I'm searching for polylactic acid (that used in 3D printing) solvent, that is less toxic. It's used to postprocessing to polish object. Dichloroethane is toxic, acetone and dichloromethane less, but ...
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1answer
12k views

Halogenation of Phenol [closed]

Why does only one $\ce{Br+}$ ion get generated in a non-polar solvent (such as $\ce{CS2}$), while more $\ce{Br+}$ ions are generated in aqueous or polar solvent (such as $\ce{H2O}$)?
4
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1answer
255 views

Using Nanodrop for UV/Vis analysis of compounds at limited amounts [closed]

I am no chemist, but a biologist who knows some biochemistry. I have some natural extracts at limited quantity, which I have been evaluating using mainly GC-MS. These extracts are rich in liquid ...
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1answer
42 views

How to evenly mix NaCl and Lactose

Q: You have 10 g NaCl (s) and 90 g Lactose (s) (both easily soluble in water.) You want to achieve a 100 g mixture of these two compounds in solid form where they are completely evenly mixed. (A 1 mg ...
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1answer
429 views

How to choose alcohol solvent for organic extraction?

Assuming I have an organic substance that is known to be "soluble in alcohol" (e.g. capsaicin) I want to extract, which alcohol should/can I use? I know that both ethanol and methanol are commonly ...
4
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1answer
2k views

For what reasons, is isopropyl alcohol widely used as a cleaning solvent?

I have worked in electronics and aeronautics industry 30 years ago, and I have always wondered, what were the specific properties of isopropyl alcohol, which make it used instead of other alcohols ...
5
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1answer
491 views

Isopropanol in contact lens solution plastic bottle

I have a rather large plastic bottle of isopropanol ($99.7\%$), and I wanted to store some of it in a smaller, more handy container. I have two empty plastic bottles from contact lens solution that I ...