charliieee
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Which compound can be purified by forming a hot aqueous solution that recrystallises on cooling?
cyclohexene
ethanoic acid
phenylamine
benzoic acid

answer is benzoic acid but why
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Merle Dixon 52
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Because Benzoic acid is soluble in hot water
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charliieee
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(Original post by Merle Dixon 52)
Because Benzoic acid is soluble in hot water
thanks, but i would have thought ethanoic acid and phenyl amine are also soluble because they can also make hydrogen bonds?
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Merle Dixon 52
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Key word in the question is "hot." Benzoic acid is only soluble in hot water, whereas ethanoic acid for example is soluble in water at lower temperatures as well.
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charliieee
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(Original post by Merle Dixon 52)
Key word in the question is "hot." Benzoic acid is only soluble in hot water, whereas ethanoic acid for example is soluble in water at lower temperatures as well.
thank you so much! makes much more sense now.
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Merle Dixon 52
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(Original post by charliieee)
thank you so much! makes much more sense now.
Np
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