Question

Give reasons for the formation of scum when soaps are used with hard water

Answer 1

Answer:

this is because the charged calcium and magnesium particles present in water react with soap to form a insoluble substance.the New substance scum does not dissolve in water.

Answer 2

Explanation:

hard water contains calcium and magnesium and soap is basically sodium or potassium salt of higher fatty acids when soap is added to hard water corresponding calcium and magnesium salts are formed which being in soluble that dissipated this precipitated second is come reaction taking place