Soap: Soap is a metallic salt of saturated (CnH2n+1COOH) or unsaturated (CnH2n+1COOH) Higher Fatty Acid. There may be pb, Mg, Ca or other metallic salts.But as detergents only Na or K salt of higher fatty acids, soap is made on a commercial scale by boiling natural oil or fatty oil which is used for soap …