Recrystallization: Choosing Solvent & Inducing Crystallization

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fieldguide2chemistry

Күн бұрын

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@YouMockMe 3 жыл бұрын

Good video.... any day I learn something is a good day!

@prakashbishnoi6593 4 ай бұрын

Very good explanation But if reactant and product both solid which solvent select for recrystallization and how to salect

@hannahfay59 2 жыл бұрын

Your amazing....

@PyroRob69 11 ай бұрын

Since you are choosing a solvent, which solvent should I use to dissolve and recrystalize sodium hydroxide with?

@fieldguide2chemistry 11 ай бұрын

Figuring out a good recrystallizing solvent may take trial an error not only testing out different solvents (and solvent mixtures) but also testing out different concentrations. While sodium hydroxide is very soluble in water, one can recrystallize NaOH in water at high concentrations such as 60 grams NaOH in 100 mL of water. The purity may be good but the yield may be low. I would also explore alcohols such as ethanol and isopropanol which my require less concentrated solutions and result in higher yields. Two other solvents I would try would be acetonitrile and ethyl acetate. In both cases heating might be better done with a reflux set-up rather than heating on a hot plate leading to a lot of evaporation

@PyroRob69 11 ай бұрын

@@fieldguide2chemistry Thanks for responding. I looked up several solubility tables and they showed that non-polar solvents would be best but then do I want the end product polluted with something like acetone or dimethylether? What I am looking at is trying to clean up hardware store sodium hydroxide. I saw due to it's solubility, it would be difficult to settle out the end product, but since I don't know what the contaminants are, I have to try to pull one or the other out.