Question

$0.76$ g of silver salt of dibasic organic acid on ignition left $0.463$ g of metallic silver. The equivalent mass of acid is :

• A. $70$
• B. $108$
• C. $60$
• D. $50$

Answer 1

The correct option is A $70$

Weight of silver salt taken = 0.76 g

Weight of silver left as residue = 0.463 g

Equivalent weight of silver = $\frac{0.76}{0.463}\times 108$ = 177.05 g

Equivalent weight of acid = 177.05 - 108 + 1 = 70

So Option A is correct