How are detergents and soaps used to check hardness of water?
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if soap and detergent gives more reaction with water than the water is soft otherwise water is hard.
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The reaction is called saponification and procedures one molecule of glycerine and three molecules.
This includes each molecules of fat taken and fats and oils.
It is most commonly includes in soap preparation that are lard and tallow from animal sources and coconut and palm.
When triglycerides in fat/oil react with aqueous NaOH or KOH, they are converted into soap and glycerol.
This is called alkaline hydrolysis of esters.
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