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Question

How many molecules of water of crystallisation (per formula unit) are present in :

(a) copper sulphate crystals ?

(b) washing soda ?

(c) gypsum ?


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Solution

1. Copper Sulphate (CuSO4.5H2O ): 5 molecules of water of crystallization.

2. Washing soda (Na2CO3.10H2O ): 10 molecules of water of crystallization

3. Gypsum (CaSO4.2H2O): 2 molecules of water of crystallization


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