ICSE Class 10 Chemistry 2017 Solved Paper
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Question : 32
Total: 86
Calculate the percentage of water of crystallization in CuSO 4 .5 H 2 O
( H = 1 , O = 16 , S = 32 , C u = 64 )
Solution:
Molar mass of CuSO 4 ⋅ 5 H 2 O
= [ 54 + 32 + 16 × 4 + 5 × 18 ]
= 250
Mass of water of crystallisation= 90
% of water =
× 100
= 36 %
Mass of water of crystallisation
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