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Surface Water

During the io...

Question

During the ion-exchange method of converting hard water into soft water calcium and magnesium ions are exchanged with_______

A

Chloride ion

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B

Sodium-ion

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C

Copper ion

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D

Ferric ion

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Solution

The correct option is B Sodium-ion
The method used to remove the hardness of water is to pass it through a column of ion-exchange resins where calcium and magnesium ions get replaced by sodium ions. This converts hard water into soft water.

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