Q.
Zinc sulphate contains 22.65% zinc and 43.9% water of crystallization. If the law of constant proportions is true then the weight of zinc required to produce 20 g of the zinc sulphate crystals will be
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a
45.3 g
b
4.53 g
c
0.453 g
d
453 g
answer is B.
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Detailed Solution
To prepare 20g zinc sulphate crystals, zinc required=22.65100×20=4.53 g
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