O R C O K CH OH + 3KOH R’ K O OH
Potassium soaps are more soluble than sodium soaps and readily produce lather. Therefore, potassium soaps are used to make liquid soap and shaving cream. Soaps from highly saturated, solid fats, such as tallow, lard, or shortening, are hard. Saponification of an unsaturated oil, such as olive oil, gives a soft soap.