Define degree of hardness of water.

What is the unit for expressing the degree of hardness of water?

A sample of hard water contains 1 xx 10^(-3) mole of CaCl_2 per 10kg of water. Calculate the degree of hardness of water sample

What is permutit ? What is degree of hardness of water ? What is the unit of degree of hardness of water ?

The degree of hardness of water is usually expressed in terms of

The degree of hardness of water is usually expressed in terms of

The degree of hardness of water is usually expressed in terms of