question_answer 1)

Calculate the pH of solution formed on mixing 0.2 M \[N{{H}_{4}}Cl\] and 0.1 M \[N{{H}_{3}}\]. The\[p{{K}_{b}}\] of ammonia solution is 4.75.

Answer:

According to Henderson equation \[14-pH=p{{K}_{b}}+\log \frac{[Salt]}{[Base]}\] \[14-pH=4.75+\log \left( \frac{0.2}{0.1} \right)\] \[pH=8.95\]