Question

K. In CuSO,5H,O the percentage of water
is ......
(Cu = 63.5, S = 32, 0 = 16, H= 1)
b. 36 %
d. 72 %
nrnnerties of a
a. 10 %
c. 60%
System​

Answer 1

Molar mass cf CuSO₄.5H₂O = [64 + 32 + (16 x 4)+ 5 (2 x 1 + 16)] = 250  

Mass of water of crystallisation = 5 ( 2 x 1 + 16) = 90

% of water of crystallisation = $\frac{90}{250} \times100$ = 36%

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Answer 2

Answer:

Molar mass cf CuSO₄.5H₂O = [64 + 32 + (16 x 4)+ 5 (2 x 1 + 16)] = 250

Mass of water of crystallisation = 5 ( 2 x 1 + 16) = 90

% of water of crystallisation = \frac{90}{250} \times100

250

90

×100 = 36%

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