what is the cause of permanent hardness of water
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Permanent hardness in water is hardness due to the presence of the chlorides, nitrates and sulphates of calcium and magnesium, which will not be precipitated by boiling. The lime scale can build up on the inside of the pipe restricting the flow of water or causing a blockage
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Explanation:
Permanent hardness of water is because of the presence of soluble salts of calcium and magnesium in the form of chlorides in water.
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