Question

people use a variety of methods to wash clothes. Usually after adding the soap, they 'beat' the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine why is agitation necessary to get clean clothes?

Answer 1

There are two parts in a soap molecule - hydrophobic and hydrophilic. Soap molecules attach themselves to the grease or dirt particles with the help of these and form a cluster called micelle. The micelles remain suspended as a colloid. It is necessary to agitate the clothes in order to remove these micelles which have entrapped the dirt.

Answer 2

Answer: Molecules of soap form micelles with dirt, such as grease. Micelles remain suspended as colloid. To remove dirt in the form of micelles from clothes agitation is necessary to get clean clothes.