Question

Explain : Crystallisation method is a better technique than evaporation​

Answer 1

Crystallization technique for purification is better than evaporation because:

• Extent of purification in case of crystallization technique is very high.
• Does not require very high temperature conditions, there is no need to boil the solvent.
• The technique does not require very high apparatus setup for performing the purification.
• If the compound is soluble in one solvent & less soluble or insoluble in other solvent, crystallization can be done by mixing of the two solvents only.

Answer 2

Why crystalization is better than evaporation?

1. It occurs on the entire surface.
2. we get solid in the pure crystallized form.
3. The soluble impurities get removed in this process.
4. It doesn't require very high temperature conditions.