Question

EXPLAIN THE FORMATION OF SCUM WHEN HARD WATER IS TREATED WITH SOAP​

Answer 1

the contains sodium and potassium while the hard water contain calcium and magnesium ... so when the soap react with hard water it form scum which is insoluble substance ... thus we need to use more soap

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