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Question
How soap is prepared?
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Solution
Soaps are formed by heating fat or oil (i.e. glyceryl esters of fatty acids) with aqueous sodium hydroxide solution. This reaction is called saponification.
During the process of hydrolysis esters of fatty acids are hydrolyzed and the soap is obtained in the colloidal form. It floats in solution as curd. It is precipited from the solution by adding sodium chloride.
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