Water with temporary hardness may be rich in bicarbonate.
Hard water is formed by the addition of magnesium and calcium carbonates when it passes through limestone and chalk deposits.
There are two types of hardness of water; Temporary hardness and Permanent Hardness.
Temporary hardness can be caused by the presence of calcium and magnesium bicarbonates. It can be removed by boiling the water or lime softening.
Permanent Hardness is caused due to the presence of soluble salts of magnesium and calcium in the form of chlorides and sulphides. It can be removed by boiling the water. washing soda can be used to remove the hardness.
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