Chapter 23, Problem 23.5P

Interpretation Introduction

Interpretation:

Among trimethylamine, dimethylamine, methylamine and ammonia order of elutionwith the increase in $\text{pH}$ has to be explained.

Concept Introduction:

If $\text{pH}$ is greater than ${\text{pK}}_{\text{a}}$ then, deprotonation occurs and if $\text{pH}$ is less than ${\text{pK}}_{\text{b}}$ then protonation occurs.

Cation exchangers contain negative bound groups that attract solute cation. While anion exchangers contain bound positive groups that attract solute anion.