question_answer 1)

The \[p{{K}_{a}}\] of acetic acid and \[p{{K}_{b}}\] of ammonium hydroxide are 4.76 and 4.75 respectively. Calculate the \[pH\] of ammonium acetate solution.

Answer:

Ammonium acetate is the salt of weak acid and weak base; pH can be calculated as: \[pH=\frac{1}{2}[p{{K}_{w}}+p{{K}_{a}}-p{{K}_{b}}]\] \[=\frac{1}{2}[14+4.76-4.75]\] \[=7.005\]