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12.20: What is the difference between distillation, distillation under reduced pressure, and steam distillation?

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The difference between distillation, distillation under reduced pressure and steam distillation are-

Distillation Distillation under reduced pressure Steam Distillation

1. Used for the purification of compounds that are non-volatile impurities or liquids which don't decompose on boiling.

 

1. Used to purify liquids which tend to decompose on boiling. Under the condition of reduced pressure.

 

1. Used to purify the organic compounds, which are volatile and immiscible with water.

 

Simply to separate the volatile liquids from non-volatile impurities. Or a mixture of liquids having sufficient Boiling point difference.

The liquid will boil at a lower temperature than its boiling point; therefore, it does not decompose. The mixture of water and aniline can be separated by this method.

 

 The mixture of petrol and kerosene is separated by this method.

Glycerol is purified by this method.  

 

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