(a) Impure compounds tend to have lower melting points than pure samples. Explain why this occurs, using biphenyl as an example. Make sure you consider what happens upon melting in molecular terms. (b) Is recrystallization a suitable method for purifying all types of organic compounds? If not, why not?

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter22: Organic Chemistry
Section: Chapter Questions
Problem 60QAP: Write an equation for the reaction of chloroacetic acid (Ka=1.5103) with trimethylamine (Kb=5.9105)...
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Why do impure chemicals have lowering melting points? Can recrystallization be used to purify all organic compounds?

(a) Impure compounds tend to have lower melting points than pure samples. Explain why this occurs,
using biphenyl as an example. Make sure you consider what happens upon melting in molecular terms.
(b) Is recrystallization a suitable method for purifying all types of organic compounds? If not, why not?
Transcribed Image Text:(a) Impure compounds tend to have lower melting points than pure samples. Explain why this occurs, using biphenyl as an example. Make sure you consider what happens upon melting in molecular terms. (b) Is recrystallization a suitable method for purifying all types of organic compounds? If not, why not?
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