Give the cause of permanent hardness of water. How hardness is removed? give some disadvantage of hard water.
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Hardness is removed using SODIUM CARBONATE
(Na2CO3
it has many disadvantages
Permanent Hardness is due to the presence of dissolved chlorides and sulfates of Calcium, Magnesium, Iron, and other heavy elements. It cannot be eliminated by boiling.
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The cause OS hardness of water is when the soluble salts of magnesium and calcium are present in the form of chlorides and sulphides in water, we call this permanent hardness because the hardness cannot be removed by boiling. We can remove the hardness by treating the water with washing soda. A disadvantage if hard water is that the hard water can block the hot water pipes.
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