Chapter 4, Problem 4.76QP

Interpretation Introduction

Interpretation:

The working method of indicators in Acid–Base titration should be explained.

Concept introduction:

Acid-Base indicator

• The Acid-Base indicators are chemical substances, which changes their color respect with $\text{pH}$ of the solution, when it is dissolved in it.
• The unknown concentrations of acids or bases are exactly neutralizingwith equal known concentrations of acids or bases.
• After complete neutralizing all in the Acid–Base titration the $\text{pH}$ of the solution is varying by Acidic or Basic.  So, in this $\text{pH}$ the indicators make a colour change.
• The colour change of an indicator solution is the end point of the solution.
• To explain the working method of indicators in Acid – Base titration.