Question

Define hardness of water. What are its units and give relationship between these units?​

Answer 1

Answer:

1 mol has approximately 6.023 x 10^23 ions. ... So one way to measure hardness is in mol/L or mmol/L. Other common units are milligrams per liter (mg/L), grains per gallon (gpg) or parts per million (ppm). Parts per million just means how many ions of calcium or magnesium you have in a million molecules of water.

Explanation:

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