Question

Name the three substances which can be purified by crystallisation

Answer 1

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.  

• The solid solute forms a crystalline substance which can then be e used.  

• The method of crystallisation can only be used in the purification of those substances which forms crystal when it is not dissolved in aqueous medium.  

• Crystallisation can be used in in Potash alum, washing soda since they contain water of crystallization.

Learn more about crystallisation

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Describe the crystallisation of copper sulphate

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Answer 2

Answer:

HAND PICKING

WINNOWING

MAGMATIC SEPRATION