Question

When a solution of benzoic acid was titrated with $NaOH$ the $pH$ of the solution when half the acid neutralized was $4.3$. Dissociation constant of the acid is [Use $\log 2=0.3]$.

• A. $5\times {10}^{-3}$
• B. $3.2\times {10}^{-5}$
• C. $8.7\times {10}^{-6}$
• D. $6.42\times {10}^{-4}$

Answer 1

The correct option is A $5\times {10}^{-3}$