Question

The permanent hardness of water is caused by the presence of which one of the following ion? * 1 point sulphate nitrate chloride carbonate​

Answer 1

Answer:

Permanent hardness is hardness (mineral content) that cannot be removed by boiling. When this is the case, it is usually caused by the presence of calcium sulfate and/or magnesium sulfates in the water, which do not precipitate out as the temperature increases.

Explanation:

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Answer 2

Answer:

Permanent hardness in water is due to the presence of the chlorides, nitrates and sulphates of calcium and magnesium. It is not precipitated by boiling. These minerals in water can cause some everyday problems.

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