Q. The pH of an aqueous solution of $CH_{3}COONa$ of concentration $C(M)$ is given by
A) $7 - \frac{1}{2}pK_{a} - \frac{1}{2}\log C$
B) $\frac{1}{2}pK_{w} + \frac{1}{2}pK_{b} + \frac{1}{2}\log C$
C) $\frac{1}{2}pK_{w} - \frac{1}{2}pK_{b} - \frac{1}{2}\log C$
D) $\frac{1}{2}pK_{w} + \frac{1}{2}pK_{a} + \frac{1}{2}\log C$
Explanation
(d)
In case of hydrolysis of salt of weak acid and strong base, the pH is given by
$\frac{1}{2}pK_{w} + \frac{1}{2}pK_{a} + \frac{1}{2}\log C$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.