explain the cleaning action of soap?
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87
Soap helps insoluble particles to become soluble in water. It makes the cleaning easy. Oil or fats are insoluble in water.
Soap molecules has two parts- the polar head and the non-polar long hydrocarbon tail. The polar part is associated with the water .The insoluble oil/fat molecules become associated inside the micelle formed by soap molecules with polar hydrophilic (water-loving) groups on the outside and encasing a hydrophobic (water-hating) pocket. The fat molecules are attached to the micelle which shields the oil/fat molecules from the water making it soluble. Once the dirt or fat molecules are dissolved in water, it can be rinsed away easily.
Soap molecules has two parts- the polar head and the non-polar long hydrocarbon tail. The polar part is associated with the water .The insoluble oil/fat molecules become associated inside the micelle formed by soap molecules with polar hydrophilic (water-loving) groups on the outside and encasing a hydrophobic (water-hating) pocket. The fat molecules are attached to the micelle which shields the oil/fat molecules from the water making it soluble. Once the dirt or fat molecules are dissolved in water, it can be rinsed away easily.
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70
Cleansing action of soap : We put dirty cloth in the soap solution. Dirty is mainly greasy matter . The soap molecules are arranged radially with hydrocarbonate ends directed inwards into the greasy matter and ionic part directed outwards into the water. When a dirty cloth is inserted in the solution then then the hydrocarbon part sticks to the dirt or oil.With a little agitation the dirt particles get entrapped by the soap micelles and get dispersed in water due to which the soap water gets dirty and the cloth gets cleaned
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