Chapter 16, Problem 2SAQ

Interpretation Introduction

Interpretation:

The option corresponding to the correct value of $\text{pH}$ of the buffer that is $0.120\text{M}$ in formic acid $\left({\text{HCHO}}_{\text{2}}\right)$ and $0.080\text{M}$ in potassium formate $\left({\text{KCHO}}_{\text{2}}\right)$ is to be identified.

Concept introduction: A buffer solution is an aqueous solution containing the mixture of a weak acid and its conjugate base or the mixture of a weak base with its conjugate acid. The buffer solution resists the $\text{pH}$ change by neutralizing the added amount of acid or base.

To determine: The option corresponding to the correct value of $\text{pH}$ of the buffer that is $0.120\text{M}$ in formic acid $\left({\text{HCHO}}_{\text{2}}\right)$ and $0.080\text{M}$ in potassium formate $\left({\text{KCHO}}_{\text{2}}\right)$ .