Chapter 12, Problem 12.25P

Interpretation Introduction

Interpretation:

The estimation of Calcium by $\text{EDTA}$ titration at $\text{11}\text{-pH}$ using Calmagite indicator should be explained.

Concept introduction:

$\text{EDTA}$Titration:

$\text{EDTA}$ is a strong ligand so it will form a complex with most all metal ions therefore the estimation of metal by titration the titrant is selected as $\text{EDTA}$.

In the $\text{EDTA}$ titration, the indicator is selected by the $\text{pH}$ of the end point and this $\text{pH}$ is different to the each metals.