Question

c)
What do you know about hardness of water? Give the types of
hardness with chemical equations.
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Answer 1

Hardness is defined as the concentrations of calcium and magnesium ions expressed in terms of calcium carbonate. ... Permanent hardness is due to calcium and magnesium nitrates, sulphates, and chlorides etc. This type of hardness cannot be eliminated by boiling.

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Answer 2

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