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describe in brief the cleans of soap .why do soap not form ladder in hard water |
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Answer» Soaps are sodium or potassium salts of long chain of carboxylic acids. most dirt is oily in nature, soap molecule form structure called micelles were one end of the molecule is towards dirt, the ionic end face outside this forms an emension in water which helps in pulling out dirt from fabric and the soap micelle helps in dissolving the dirt in water. The presence of calsium or magnesium ions in the water form hard water and thats why soap do not form lather in hard water. Soap is a sodium and potassium salt of long chain fatty acid or carboxylic acid. When soap is used for cleansing action it will form micelles around the dirt partical and grease. The hydrophobic part(which hates water) of micelle attach around the gease(away from the water) and the hydrophilic part(which loves water) is towards water. Then after agitation these dirt and micelle will detached from the cloth and the cloth is clean. The soap reacts with the calcium and magnesium ions which are present in the hard water and produces a insoluble substance called "scum".That\'s why soap doesnot react with hard water. Because of presence of calcium or magnesium ions |
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