Question

Define temporary hardness & Permanent hardness of water?​

Answer 1

Answer:

Temporary hardness is treated by heating the hard water. ... Permanent hardness of water is caused when chlorides and sulfides of calcium and magnesium are dissolved in water. It is known as permanent hardness because it cannot be removed by boiling. To remove permanent hardness the hard water is treated with washing soda.

Explanation:

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Answer 2

Answer:

Temporary hardness is a type of water hardness caused by the presence of dissolved bicarbonate minerals (calcium bicarbonate and magnesium bicarbonate). The presence of the metal cations makes the water hard.

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.