Question

What is meant by water of crystallisation of a substance ? Describe an activity to show the water of crystallisation?

Answer 1

Water of Crystallization is the fixed no. of molecules which are present in one formula unit of salt.

Activity-

Aim-To show the water of crystallization

Materials required- HYDRATED Copper sulphate, Bunsen Burner, test tube.

Procedure-Put some copper sulphate crystals in a test tube and heat it with Bunsen burner.

Observation-The blue colour crystals of Copper sulphate changes to white powder on removal of 5 molecules of water of crystallization and water droplets are observed on the inner surface of test tube.

Equation-CuSO₄.5H₂O⇒CuSO₄

Answer 2

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Crystallization is a technique used for the purification of substances. A separation technique to separate solids from a solution. ... On adding a solid substance in a liquid and stirring it, the solid dissolves in the fluid.

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