Question

How many water molecules does hydrated cal-cium sulphate contain?
(a) 5
(b) 10
(c) 7
(d) 2
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Answer 1

Hydrated Calcium Sulfate [CaSO4. xH2O] contains 21% (by mass)of water of crystallization. The number of molecules of water of crystallization, i.e., 'x' in the hydrate compound is: (Ca=40, S=32, O=16, H=1)

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Answer 2

Answer:

the answer for this question is -2

Explanation:

(Caso4×H2o) molecular mass=(136+18x)gm% of water in hydrate compound.

18x*100

_________ =2

136+18x

hence-

x=2

therefore the water molecule in hydrated calcium sulphate are 2.

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