Chapter 16.7, Problem 9PE

Interpretation Introduction

Interpretation: The $\text{pH}$ of a solution that is $0.15\text{M}$ in benzoic acid and $0.1\text{M}$ in sodium benzoate is to be calculated.

Concept introduction: The $\text{pH}$ is defined as the measure of hydrogen ion concentration. It is the numerical scale which is used to determine whether the given solution is acidic or basic in nature.

The $\text{pH}$ of the solution is calculated by Henderson-Hasselbalch equation,

$\text{pH}=\text{p}{K}_{\text{a}}+\text{log}\left(\frac{\left[\text{Base}\right]}{\left[\text{Acid}\right]}\right)$

To determine: The $\text{pH}$ of a solution that is $0.15\text{M}$ in benzoic acid and $0.1\text{M}$ in sodium benzoate