Explanation:

The mineral salts of higher fatty acids such as oleic acid (C₁₇ H₃₃ COOH) , stearic acid (C₁₇ H₃₅ COOH) and palmitic acid (C₁₅H₃₁COOH) etc. are called soaps.Out of these, only sodium and potassium salts of fatty acids being water soluble, are widely used for cleaning purposes.