Q. 114.5( 2 Votes )
Explain why when
When a blue salt of copper sulphate is heated it becomes colourless because:
a. Blue copper sulphate crystals which are dry contain water of crystallization.
b. When we heat the crystals, the water is removed.
c. As a result, the salt turns white or colourless.
Note: Water of crystallization is the fixed number of water molecules present in one formula unit of salt. Five water molecules are present in one formal unit of copper sulphate, i.e., CuSO4.5H2O
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