What is soap about soap

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About soap:- 

    Soaps are sodium or potassium salts of hoghhi fatty acids obtained from oils and fats available in nature . 
  Soap forms lather only in soft water . So, these are used to clean clothes in only soft water .
  The soap solution in water is alkaline and soap can't be used to wash delicate fabric like silk and wool .
 Soap can't be used in slightly acidic medium.


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