How are synthetic detergents better than soaps?

Solution

Synthetic detergents can be used for washing purposes even when the water is hard, whereas soaps are not suitable for washing with hard water. This is because of the fact that synthetic detergents can lather with hard water. This is because of the fact that synthetic detergents can lather well even in hard water because they do not form insoluble calcium or magnesium salts on reacting with calcium and magnesium ions present in hard water. Soap, however, forms insoluble calcium and magnesium salts with hard water which reduces its cleansing ability.
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Hence, Synthetic detergents better than soaps.