What is a soap? Name one soap.
Soap is a mixture of sodium or potassium salts of various natural fatty acids and oils, which when used with water show cleansing properties. A soap contains a large, non-ionic hydrocarbon group and an ionic group COO-Na+.
An example for a soap is sodium stearate (C17H35COO-Na+). It is a salt of sodium of fatty acid called stearic acid with a non-ionic hydrocarbon group C17H35, and an ionic carboxylate group COO- Na+.