Question

If `pK_(a)` of acetic acid and `pK_(b)` of ammonium hydroxide are 4.76 each. The pH of ammonium acetate is
A. 7
B. Less than 7
C. More than 7
D. Zero

Answer 1

Correct Answer - A
pH of a salt of weak acid and weak base is
`pH = 7 + (1)/(2)pK_(a) - (1)/(2)pK_(a)`
`pH = 7 + (1)/(2) xx 4.76 - (1)/(2) xx 4.76 = 7`.