JEE Main 2014 · 11 Apr · Shift 1 · Chemistry Q34

ChemistrySingle correct+4 / -1Question 34 of 90

Assuming that the degree of hydrolysis is small, the pH of 0.1 M solution of sodium acetate ( $K_a=1.0\times10^{-5}$ ) will be :

5.0

6.0

8.0

9.0

Answer and worked solution

Official answer: D

For the salt of a weak acid and a strong base:
$\text{pH}=7+\tfrac12(pK_a+\log C)=7+\tfrac12(5-1)=9.$

JEE Main 2014 · 11 Apr · Shift 1, Chemistry question 34