Question

$2$ g of a base whose equivalent weight is $40$ reacts with $3g$ of an acid. The equivalent weight of the acid is:

Answer 1

Correct Answer: 60

Explanation:
Given:Mass of base $=2g$The equivalent weight of base $=40$Mass of acid $=3g$We have to find the equivalent weight of acid.$2$ g of a base reacts with $3$ g of acid.Let the equivalent weight of acid be E.Gram-equivalent is given by:Gram-equivalent $=\frac{\text{ Mass }}{\text{ Equivalent Mass }}$Now since equivalents of all the reactants and products are equal.Gram-equivalent of base = Gram-equivalent of acidor,$\frac{\text{ Mass of base }}{\text{ Equivalent mass of base }}=\frac{\text{ Mass of acid }}{\text{ Equivalent mass of acid }}$Substituting all the values in equation (i), we get$\frac{2}{40}=\frac{3}{E}$$E=\frac{3\times 40}{2}=60$Therefore, equivalent weight of acid is $60.$Hence, the correct answer is 60.