Chemistry, asked by akmal3103, 10 days ago

10 mL of EDTA solution. Calculate the various hardnesses in ppm.
8. Calculate the hardness in a given hard water sample having the following data.
50 mL of standard hard water containing 1 mg of Caco, per ml. 50 mL of
standard hard water consumed 25 mL EDTA using eriochrome black T as
indicator. 50 mL water sample consumed 40 mL EDTA using the same
indicator. 50 mL water sample after boiling consumed 25 ml of EDTA using
the same indicator
dinolyed in HCL and the solution made​




If a test for hard water is measured in parts per million or milligrams per liter you can take the total hardness level and divide it by 17.1 to get hardness in grains per gallon. For example if your water test shows 250 mg/L hardness you actually have 14.62 grains per gallon.

This is the Way to calculate hardness in ppm

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