Write brifly about of the applications of coordination compouds in volumetric analysis.

Explanation

Hardness of water is due to the presence of `Ca^(2+) and Mg^(2+)` ions in water EDTA forms stable complexes with `Ca^(2+) and Mg^(2+)` . So the total hardness of water can be estimated by simple volumetric titration of water with EDTA.