What is hardness of water types of hardness of water method to remove hardness of water?
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Permanent hardness is due to the presence of chlorides and sulphates of calcium and magnesium.
It is not removed by boiling.
However it can be removed by
(i) When sodium carbonate or soda ash is added to water, it removes both temporary and permanent hardness of water.
It is not removed by boiling.
However it can be removed by
(i) When sodium carbonate or soda ash is added to water, it removes both temporary and permanent hardness of water.
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2
Answer:
The presence of magnesium and calcium carbonates in water makes it temporarily hard. In this case, the hardness in water can be removed by boiling the water. When we boil water the soluble salts of Mg(HCO3)2 is converted to Mg(OH)2 which is insoluble and hence gets precipitated and is removed.
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