Question

A standard hard water was prepared by dissolving 0.28g of CaCO3 and making up the

solution to 1000 ml. 100 ml of this standard hard water on titration consumed 28 ml of

EDTA solution. 100 ml of a sample hard water consumed 33 ml of the same EDTA for

titration. After boiling, cooling and filtering, 100 ml of the sample water consumed 10 ml

of EDTA for titration. Calculate temporary and permanent hardness of the water sample.​

Answer 1

Explanation:

50 ml of standard hard water = V1 ml of EDTA. ... 15x100 ml of 0.01EDTA=300ml of 0.01M EDTA ... of CaCO3 was dissolved in HCl and the solution made up to 500ml with distilled water

Answer 2

Answer:

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