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Question
Calculate the percentage of water of crystallization in CuSO4.5H2O
(H = 1, O = 16, S = 32, Cu = 64)
Solution
Given :
Atomic mass of H 1
Atomic mass of O 16
Atomic mass of S 32
Atomic mass of Cu 64
Molar mass of CuSO4.5H2O (64) + (32) + (9 x 16) + (10 x 1)
= 250
Molar mass of five water molecules (10 x 1) + (5 x 16)
= 90
Percentage of water of crystallization = `(90 xx 100)/250` = 36% water of crystallization.
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