Chapter 26, Problem 34P

Interpretation Introduction

Interpretation:

The ratio of A and B at $\text{pH}=7$ using Henderson-Hasselbalch equation is to be calculated. Also, the $\text{pH}$ value at which $\left[\text{A}\right]$ is the largest has to be determined.

Concept introduction:

The zwitter ion refers to a molecule that consists of both positive as well negative groups. The overall charge is neutral on a zwitterion. The best examples of zwitter ion are amino acids.

The Henderson-Hasselbalch equation is given below.

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

Here, $\left[\text{A}\right]$ is the concentration of acid and $\left[\text{B}\right]$ is the concentration of conjugate base.