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People use a variety of methods to wash ...

People use a variety of methods to wash clothes, Usually after adding the soap, they 'beat' the clothes ona 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 be clean clothes?

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A soap molecule has two parts namely hydrophobic and hydrophilic.With the help of these it attacks to the grease or dirt particle and forms a cluster called micelle.These micelles remain suspended as a colloid .To remove these micelles,it is necessary to agitate clothes.
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People use a variety of methods to wash clothes . Usually after adding the soap, they beat the clothes on a stone, or beat them with a paddle , scrub with a brush , or the mixture is agitated in a washing machine . Why is agitation necessary to get clean clothes?