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:
- Agitation is necessary to get clean clothes because the soap micelles which entrap oily or greasy particles on the surface of dirty cloth have to be removed from its surface.
- When the cloth wetted in soap solution is beaten (or agitated), the micelles containing oil/dirt particles get removed from the surface of the cloth and go into water .
- Therefore, the dirty cloth is cleaned.