Question

What type of mixtures are separated by the technique of crystallization?​

Answer 1

By the technique of crystallization, pure solids are separated from impurities. For example, salt obtained from sea is separated from impurities :crystals of alum$\sf{(Phitkari)}$ are separated from impure samples.

Answer 2

Crystallization

Crystallization is a process of separating a pure solid in the form of its crystals from its solution.

Principle

The pure crystals of a solid separate out on cooling its hot saturated solution.

Technique of Crystallization

The solution is heated and more solid is added to the solution till it becomes saturated. Then it is cooled to obtain the pure crystals of the solid. After that the crystals are separated by filtration and dried.

Examples

• Common salt obtained from sea water has many impurities in it. It is purified by the process of Crystallization.
• Impure samples of Copper Sulphate alum are also purified by Crystallization.