Question

Wat is crystallization ? List two ways in which crystallization is better than simple evaporation technique

Answer 1

Crystallization is the process of slow precipitation of solid crystals of a substance from a concentrated homogeneous solution. It is basically a separation method in which a substance is transferred from the liquid (i.e. solution) phase to the solid state. The substance is thus obtained in pure crystalline form and has no impurity. It is used by chemists for the purification of solid substances.

Crystallisation technique for purification is better than evaporation because...

1. Extent of purification in case of crystallisation technique is very high.
2. It does not require very high temperature conditions, there is no need to boil the solvent.
3. The technique does not require complex apparatus setup for performing the purification.