One of the following is an incorrect statement, point it out?

Permanent hardness can be removed by boiling water.

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Hardness of water effects soap consumption.

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Temporary hardness is due to bicarbonates of

C a

and

M g

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Permanent hardness is due to the soluble

S O_{4}^{2 -}, C l^{-}

C a

and

M g

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Solution

The correct option is A Permanent hardness can be removed by boiling water.
Hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Water hardness that is caused by calcium bicarbonate is known as temporary, because boiling converts the bicarbonate to the insoluble carbonate; hardness from the other salts is called permanent. Calcium and magnesium ions in hard water react with the higher fatty acids of soap to form an insoluble gelatinous curd, thereby causing a waste of the soap.

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Similar questions

H_{2} O

A

B

X

X

Y

A, B, X, and Y,

M = M g, C a

Permanent hardness is due to presence of soluble salts of Mg and Ca in the form of chlorides and sulphates in $H_{2} O$ . It can be removed by

C a^{2 +}

M g^{2 +}

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