Question

what is the action of soap with hard water ​

Answer 1

Answer:

When soap is added to hard water,the Ca2+ and Mg2+ ions present in hard water react with soap.

The sodium salts present in soaps are converted to their corresponding calcium and magnesium salts which are precipitated as scum. The insoluble scum sticks on the clothes and

so the cleaning capacity of soap is reduced

Answer 2

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(i) The cleaning capacity of soap is reduced when used in hard water.

(ii) Soaps are sodium or potassium salts of long chain fatly acids.

(iii) When soap is added to hard water, the divalent magnesium and calcium cations present in hard water react with soap.

(iv) The sodium salts present in soaps are converted to their corresponding magnesium and calcium salts which are precipitated as sum or precipitate.

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