5. Solving a chemistry problem

5. Solving a chemistry problem

7. For titration of 50.00 ml of water, 19.40 ml of EDTA was used T(EDTA/Ca)=0.0004008 g/ml. To determine the constant hardness, 100.0 ml of water was boiled, transferred to a volumetric flask with a capacity of 200.0 ml, and the precipitate was filtered off. For titration of 100.0 ml of the filtrate, 17.30 ml of EDTA were used. Calculate the removable and permanent hardness of water.

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