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

(a) How is ethanoic acid obtained from ethanol? Write down the chemical equation of the reaction involved. (b) How would you distinguish between ethanol and thanooic acid by chemical test? (c ) 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?

Why does hard water not from lather with soap ?