Question

which process is used for the removal of hardness of water​

Answer 1

$\huge\mathfrak\red{hello friend }$

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if the hard water contains calcium and Magnesium Bicarbonate the hardness of water can be removed

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hardness can be removed by the addition of washing soda to water

hope it helps you

Answer 2

Many processes are used to remove permanent hardness of water.

1. Ion exchange soften system- replacement of calcium and magnesium by sodium ions.

2. phosphate dosing- small amount of phosphate is added to inhibit deposition of carbonate.

3. deionization- chemically removing both Anions and Cations leaving the water deionized.