Question

Describe the crystallization of copper sulphate

Answer 1

Answer:

First CuSO4 is colourless.When water is added to copper sulphate then 5 molecules of water combine with 1 molecule of CuSO4. And it gave CuSO4 blue colour.

Then CuSO4.5H2O is formed.

And when this solution is heated then water vapourises and CuSO4 becomes colourless again.

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.