Which one of the following processes will produce hard water?

Saturation of water with

C a C O_{3}

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Addition of

N a_{2} S O_{4}

to water.

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Saturation of water with

M g C O_{3}

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Saturation of water with

C a S O_{4}

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Solution

The correct options are
A Saturation of water with $C a S O_{4}$
C Saturation of water with $C a C O_{3}$
D Saturation of water with $M g C O_{3}$
Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of calcium and magnesium-containing minerals such as limestone, chalk and dolomite.
The following processes will produce hard water
1. saturation of water with $C a C O_{3}$
2. saturation of water with $M g C O_{3}$
3. saturation of water with $C a S O_{4}$
Hence options A,B & D are correct.

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Similar questions

Saturation with which of the following substances will produce hard water?

S O_{4}^{2 -}

C l^{-}

C a^{2 +}

M g^{2 +}

N a_{2} C O_{3}

C a S O_{4} + N a_{2} C O_{3} ⟶ C a C O_{3} + N a_{2} S O_{4}

C a C l_{2} + N a_{2} C O_{3} ⟶ C a C O_{3} + 2 N a C l

100

C a C O_{3}

N a_{2} C O_{3}

10

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