People use a variety to 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 ?
People use a variety to 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 ?
A soap molecule has two parts:-
i) Hydrophobic part, i.e., the hydrocarbon tail which is insoluble in water and repelled by water.
ii) Hydrophilic part, i.e., negatively charged end which is soluble in water.
With the help of these parts, soap can attach dirt and grease particles and form spherical clusters known as micelle. Due to ion-ion repulsion, micelles remain suspended as a colloid in the water. In order to remove these micelles containing dirt, it is necessary to scrub or agitate the clothes.
A soap molecule has two parts:-
i) Hydrophobic part, i.e., the hydrocarbon tail which is insoluble in water and repelled by water.
ii) Hydrophilic part, i.e., negatively charged end which is soluble in water.
With the help of these parts, soap can attach dirt and grease particles and form spherical clusters known as micelle. Due to ion-ion repulsion, micelles remain suspended as a colloid in the water. In order to remove these micelles containing dirt, it is necessary to scrub or agitate the clothes.
