Chapter 9, Problem 9.121E

Interpretation Introduction

Interpretation:

Whether citric acid or sodium citrate would be added to the solution that has a pH of $3.20$ to increase the pH to a value of $3.35$ is to be stated. The explanation for the corresponding answer is to be stated.

Concept Introduction:

The buffer is a solution that resists any change in pH on addition of ${\text{H}}^{+}$ and ${\text{OH}}^{-}$. An acidic buffer is made up of a weak acid and its salt. A basic buffer is made up of a weak base and its salt. The pH of the acidic buffer is given as,

$\text{pH}={\text{pK}}_{\text{a}}+\log \frac{\left[{\text{B}}^{-}\right]}{\left[\text{HB}\right]}$