Some Basic Concepts Of Chemistry Question 3

Question: Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be

Options:

A) 45.3 g

B) 0.453 g

C) 4.53 g

D) 453 g

Show Answer

Answer:

Correct Answer: C

Solution:

100 g of $ ZnSO _4 $ crystals are obtained from = 22.65g Zn 1 g of $ ZnSO _4 $ crystals will be obtained from $ =\frac{22.65}{100}g $ 20 g of $ ZnSO _4 $ crystals obtained form = $ \frac{22.65}{100}\times 20=4.53g $



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