Explain the formation of scum when hard water is treated with soap.

Explain the action of soap with hard water.

What problem does arise when hard water is treated with soap ?

What happens when hard water is treated with washing soda?

(i) You have three unlabelled test-tubes containing ethanol, ethanoic acid and soap solution. Explain the method you would use to identify the compounds in different test tubes by chemical tests using litmus paper and sodium metal. (ii) Give the reason of formation of scum when soaps are used with hard water.

Explain with equation, what is noticed when permanent hard water is treated with slaked lime