chemEx 3 - Harjit Kaur Chem 201 Ex 3 I 1.The unknown from...

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Harjit Kaur Chem 201 Ex 3 I 1.The unknown from ex 2 is purified by recrystallizing it and then comparing it with the to the melting points of acetanilide and phenacetin. Acetanilide 114 mp Solubility= .54 Solubility b w=5.0 Phenacetin 135 mp Solubility=. 076 Solubility b w=1.22 2. In a typical recrystallization procedure, the crude solid is dissolved by heating it in a suitable solvent. The hot solution is then filtered by gravity and the filtrate is allowed to cool to room temperature or below, whereupon crystals appear in the Saturated solution and are collected by vacuum filtration. The crystals are ordinarily much purer than the crude solid because most of the impurities either fail to dissolve in the hot solution, from which they are separated by gravity filtration or transfer, or remain dissolved in the cold solution, from which they are separated by vacuum filtration or centrifugation. II
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chemEx 3 - Harjit Kaur Chem 201 Ex 3 I 1.The unknown from...

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