Question

How does washing soda help to remove permanent hardness of water?

Answer 1

$\huge \mathfrak \red{Hey\:Deara!}$

$\huge \bold \purple {Answer :-}$ The hard water is an impure form of water having a high mineral contents, like Ca, Mg, sulphides, chlorides , bicarbonates etc and do not give lather with ordinary soap.

But, the washing soda is sodium carbonate Na2CO3 , which when dissolves in the Ca+2 /Mg+2 containing hard water, the calcium or magnesium ion forms a insoluble carbonate with washing soda which comes out and the soluble salt remains in the solution and the solution gives lather.

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Answer 2

Answer: By soda process we can remove the hardess water

One of the soda is washing soda which remove hardness in water

Experiment is given down

Explanation: