Question

0.84g of metal carbonate reacts completely with 40ml of 0.5 M HCl soln. What is the equivalent
weight of the metal carbonate is -
(A) 20
(B) 12
(C) 42
(D) 30​

Answer 1

Explanation:

Let the equivalent weight of metal carbonate is W. 

Number of equivalents metal carbonate =W0.84

Comparing equivalents of metal carbonate and H2SO4−

W0.84=100040×0.5

W=42

Hence, option C is correct.