Question

$0.1N$ solution of sodium acetate will have pH________ ($p{K}_a=4.57$)

• A. $8.78$
• B. $11.57$
• C. $4.57$
• D. $7.0$

Answer 1

The correct option is A $8.78$

Sodium acetate is a salt of weak acid and strong base. So $pH=7+\frac{1}{2}p{K}_a+\frac{1}{2}\log C$.

$pH=7+\frac{1}{2}\left(4.57\right)+\frac{1}{2}\log 0.1=8.78$