Chapter 16, Problem 16.23QP

Interpretation Introduction

Interpretation: The $\text{pH}$ of buffer solution containing the given amount of ${\text{HPO}}_{\text{4}}{}^{2-}$ and ${\text{H}}_2{\text{PO}}_{\text{4}}{}^{-}$ is to be calculated.

Concept introduction: The $\text{pH}$ of the solution is calculated by the formula,

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

To determine: The $\text{pH}$ of buffer solution containing ${\text{H}}_2{\text{PO}}_{\text{4}}{}^{-}$ and ${\text{HPO}}_{\text{4}}{}^{2-}$.