12.20: What is the difference between distillation, distillation under reduced pressure, and steam distillation?
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.
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1. Used to purify liquids which tend to decompose on boiling. Under the condition of reduced pressure.
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1. Used to purify the organic compounds, which are volatile and immiscible with water.
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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.
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The mixture of petrol and kerosene is separated by this method. |
Glycerol is purified by this method. |