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Question

Find the percentage of water of crystallisation in CuSO4.5H2O. (At. Mass Cu64,H=1,O=16,S=32)
 


Solution

Molar mass of CuSO4.5H2O = 159.609  + 90 =  ~250

Mass of water of crystallization = 5 cross times 18 = 90

Percentage =90 over 250 cross times 100      = 36%.

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