Question

EDTA is used for the estimation of

Answer 1

Explanation

Complexometric titration: This is particularly useful for the determination of a mixture of different metal ions in a solution.

• EDTA is used for the estimation of Calcium $\left({\mathrm{Ca}}^{2+}\right)$and Magnesium $\left({\mathrm{Mg}}^{2+}\right)$ ions.

${\mathrm{M}}^{2+}+{\mathrm{H}}_4\mathrm{Y}\to {\mathrm{MH}}_2\mathrm{Y}+2{\mathrm{H}}^{+}$

• EDTA – Ethylenediaminetetraacetic acid – $[{\mathrm{CH}}_2\mathrm{N}{\left({\mathrm{CH}}_2{\mathrm{CO}}_2\mathrm{H}\right)}_2{]}_2.$
• EDTA is hexadentate ligand.