Question

cleansing action of a soap?

Answer 1

a strong soap generally has hydrogen sulphide for cleansing action

Answer 2

Cleansing action of Soaps and detergents: Most of the dirt is oily in nature and oil does not dissolve in water. The molecule of soap constitutes sodium or potassium salts of long chain carboxylic acids. In the case of soaps the carbon chain dissolves in oil and the ionic end dissolves in water. Thus the soap molecules form structures called micelles .In micelles one end is towards the oil droplet and the other end which is the ionic faces outside. Therefore, it forms emulsion in water and helps in dissolving the dirt r when we wash our clothes.

The soap is a kind of molecule in which both the ends have different properties. The first one is the hydrophilic end which dissolves water and is attracted towards it whereas the second one is the hydrophobic end that is dissolved in hydrocarbons and is water repulsive in nature. If on the surface of water, soap is present then the hydrophobic tail which is not soluble in water will align along the water surface.

Hope it will help you