Question

How will you estimate the total hardness of a sample of water by edta method??

Answer 1

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Total hardness of water by EDTA Method

Hardness in water is due to the presence of dissolved salts of calcium and magnesium. ... Hardness of water is determined by titrating with a standard solution of ethylene diamine tetra acetic acid (EDTA) which is a complexing agent. Since EDTA is insoluble in water, the disodium salt of EDTA is taken for this experiment.

Calcium and magnesium salts dissolved in water cause water hardness. Water hardnesscan be measured using a titration with ethylenediaminetetraacetic acid (EDTA). The ionised form of EDTA is shown on the right.
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