Question

Assuming that the degree of hydrolysis is small, the pH of 0.1 M solution of sodium acetate (K_a = 1.0 × 10⁻⁵) will be ______.

Options

• 5

• 6

• 8

• 9

Answer 1

9

Explanation:

Sodium acetate is a salt of a strong base and weak acid.

∴ pH = `7 + 1/2 "pK"_"a" + 1/2 log "c"` ...(where pK_a = −log K_a)

= `7 + 5/2 - 1/2`

= `7 + 4/2`

= 7 + 2

= 9