Chapter 2, Problem 10P

Interpretation Introduction

Interpretation:

The pH of solution when 500 mL of 0.100 M formate buffer with pH value 3.75 is added to 5 mL of 1.00 M KOH.

Concept Introduction:

For a buffer solution, pH is calculated using Henderson-Hasselbalch equation as follows:

$\text{pH}={\text{pK}}_{\text{a}}+\log \frac{\left[\text{Conjugate base}\right]}{\left[\text{acid}\right]}$

Here, pH is $-\log \left[{\text{H}}^{+}\right]$ of solution and ${\text{pK}}_{\text{a}}$ is $\text{-log}\left({\text{K}}_{\text{a}}\right)$ of weak acid.