Chapter 1, Problem 21P

Interpretation Introduction

Interpretation:

The quantity of acetic acid and sodium acetate for preparation of buffer is to be determined. The number of moles of acetic acid and sodium acetate and also their gram molecular weights needs to be estimated.

Concept introduction:

Henderson and Hasselbalch equation is used to find the concentrations. The expression is as given below,

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

Where,

• $\text{p}{K}_{\text{a}}$ is dissociation constant.
• $\left[\text{Salt}\right]$ is the concentration of salt.
• $\left[\text{Acid}\right]$ is the concentration of acid.