Chemistry, asked by sulagna803, 11 months ago

write the theory of estimation of total hardness of a sample of water by standard EDTA solution

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Answered by Anonymous

Answer:

EDTA can form four or six coordination bonds with a metal ion. Total hardness is due to the presence of bicarbonates, chlorides and sulphates of calcium and magnesium ions. The total hardness of water is estimated by titrating the water sample against EDTA using Eriochrome Black-T (EBT) indicator.

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