Question

Equivalent weight of a dibasic acid is 12. Its molecular weight is:

• A. 6
• B. 12
• C. 24
• D. 48

Hint:

For dibasic acids, the molecular weight is twice the equivalent weight, as they can donate two protons.

Answer 1

The Correct Option is C

The equivalent weight \( E \) of an acid is related to its molecular weight \( M \) by the formula: \[ E = \frac{M}{n} \] Where: - \( n = 2 \) for a dibasic acid (since it can donate two protons per molecule) - \( E = 12 \) (given) Substitute the values into the equation: \[ 12 = \frac{M}{2} \] Solving for \( M \): \[ M = 12 \times 2 = 24 \] Thus, the molecular weight is 24.