Explain crystallisation method is a better technique than evaporation
Answers
Crystallisation technique for purification is better than evaporation because...
⚛Extent of purification in case of crystallisation technique is very high.
⚛It does not require very high temperature conditions, there is no need to boil the solvent.
⚛The technique does not require complex apparatus setup for performing the purification.
⚛If the compound is soluble in one solvent & less soluble or insoluble in other solvent, crystallisation can be done by mixing of the two solvents only.
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Answer:
there are two reasons:
(a) some solids decompose or some like sugar may get charred due to heating to dryness.
(b)some impurities may remain dissolved in the solution after evaporation, but crystallisation is a method used to purify solidsin the form of its crystals.
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