Chapter 16, Problem 16.BE

Interpretation Introduction

Interpretation:

For titration of $\text{Fe}{\left(\text{CN}\right)}_{\text{6}}^{\text{4-}}$ with ${\text{Tl}}^{\text{3+}}$ in $\text{1M}$   $\text{HCl}$, the indigo tetrasulfonate would be suitable as redox indicator has to be explained.

Concept introduction:

Indicator and electrodes are generally used in acid-base titration to treasure the end point of redox titration.

Redox indicator:

The compound which changes colour when it goes to its reduced state from its oxidised state.