a) why is nacl added during the preparation of soap?
b) name the functional group present in CH3NH2 and name it
c) C2H4 + H2O ( with H3 PO4 as
Once the saponification reaction is complete, sodium chloride is added to precipitate the soap. The water layer is drawn off the top of the mixture and the glycerol is recovered using vacuum distillation.
The crude soap obtained from the saponification reaction contains sodium chloride, sodium hydroxide, and glycerol. These impurities are removed by boiling the crude soap curds in water and re-precipitating the soap with salt.