Question

How would you show that blue copper sulphate crystal contain water of crystlisation

Answer 1

When copper sulphate 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

its very simple i have studied about this last year . ok now listen Water of crystallization is molecules of water which form part of a crystal [ salt ] . the salts which contain water of crystallisation are called hydrated salts . every hydrated salt has a fixed number of water of crystallisation. for example copper sulphate crystals contain 5 molecules of water of crystallization- CuSo4.5H2O its actual name is copper sulphate pentahydrate. now pentahydrate here means 5 molecules of water. important point is that when hydrated salts are heated strongly, they lose their water of crystallisation & when they lose water of crystallisation they lose their regular shape & colour too. salts which lose water of crystallisation are called anhydrous salts. ex- CuSo45H2O - CuSo4 + 5H2O.