Some Basic Concepts Of Chemistry Question 287
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 $
