Question

why is soap ineffective for washing in hard water​

Answer 1

Answer:

the correct answer is

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.

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Answer 2

Answer:

soaps are inefective in hard water coz, hard water contain magnesium and calcium salts. the soap form scums due to ineffectivene in hard water