Question

What is crystallisation? Name any three substances which can be purified
using this technique.
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Answer 1

Answer:

Forming crystals of two objects when they are mixed

Answer 2

Crystallization is a common technique used to purify solids. Two common methods of crystallization are “gradual cooling” and “diffusion”. Gradual Cooling. Gradual cooling involves dissolving the impure solid in a minimum amount of a hot solvent and allowing the resulting solution to cool slowly to room temperature.

Potash alum, tetraamine copper sulphate, washing soda are purified by crystallization. Explanation: Crystallisation is a very popular technique to separate a solute from a solvent. In this process the solution is heated in which the water of crystallization gets evaporated.

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