Question

0.45 gm of CaCO3 was dissolved in HCI and the solution made up to 500 mL with distilled water. 50 mL of the resulting solution required 50 ml of EDTA solution for titration when titrated using EBT indicator. 50 mL of hard water sample required 18 mL of EDTA. After boiling and filtering 50 mL water from the same source required 10 mL of EDTA solution. Calculate each type of hardness of the water in CaCO3 equivalents in ppm.

Answer 1

Answer:

0.5g of CaCo3 was dissolved in dilute HCL and diluted to 500 ml with distilled water ,50 ml of this solution required 48 ml of EDTA solution for titration.50ml of hard water sample required 15 ml of EDTA solution for titration.50 ml of same water sample on boiling and filtering requires 10 ml of EDTA solution . Calculate temporary, permanent and total hardness in ppm.

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