Question

Define the cleansing action of soap

Answer 1

Heya!! Here's your answer:-

Soap is sodium or potassium or sodium salt of fatty acid. It is obtained by treating oil with caustic soda forming Sodium stearate and is a strong base. It's water solution will be slightly alkaline.

Cleansing action of soap:

Two ends of soap molecules behave differently. The ionic end is hydrophilic which is oriented towards water. The other end is hydrophobic and is oriented towards dirt which is oily in nature. A micelle formation around the oil particle takes place which when flushed with excess water, the micelle containing dirt is removed, thus cleaning the clothes.

[For 5m=whole answer

For 3m=only second para

for 1m=only last sentence]

Hope it helps!!!

Answer 2

Most dirt is oily in nature and hydrophobic end attaches itself with dirt and the ionic end is surrounded with molecule of water.This result in formation of a radial structure called micelles.Soap micelles helps to dissolve dirt and grease in water and cloth gets cleaned.The mg and ca salt present in hard water react with soap molecule to form insoluble product called scum.This scum creates difficulty in cleansing action.By use of detergent insoluble scum is not formed with hard water and cloth get cleaned effectively.

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