Chemistry Preparation
Chemistry Past Papers

Fractional Distillation

  • Fractional distillation is used to separate liquids from each other based on the difference in their boiling points
  • The thermometer in this set-up is used to measure the temperature of the vapors which exit at the top of the column adjacent to the condenser. 
  • The fractionating column is very hot at the bottom and cool at the top. 
  • Liquids with lower boiling points evaporate first and then immediately condense in the water-cooled condenser, where liquid is collected as one of the filtrates.
  • At this point, the thermometer’s temperature reading will remain constant at a specific temperature, until all of Liquid 1 has been evaporated.
  • After which the temperature will start rising again and once the boiling point of the secinf liquid is reached, it will evaporate and condense as well.
  • This can be collected in another test tube.

Reach out to us with your concerns,
we’re here to help.

We reply to right away. See for yourself.