Question

Describe an activity to show that blue copper sulphate crystals contain water of crystallization

Answer 1

Answer:

Explanation:

When copper sulphate (blue vitriol ,CuSO4.5H2O) is heated then its blue colour fades away and it turns from Blue to White and becomes anhydrous copper sulphate (CuSO4) this happens because copper sulphate loses its water of crystallization. In this way we can show that copper sulphate contains water of crystallization.

Answer 2

➢ Take some impure copper sulphate in a china dish and dissolve in minimum amount of water.

➢ Filter the solution to remove impurities.

➢ Heat the copper sulphate solution on water bath.

➢ When small crystals form on glass rods, stop heating.

➢ Allow the saturated solution to cool slowly.

➢ Crystals of pure copper sulphate are formed.

➢ Separate the copper sulphate crystals by filtration and dry.