Two miscible liquids, A and B, are present in a mixture. Class 9

Two miscible liquids, A and B, are present in a mixture. Class 9

Question 1.

Two miscible liquids, A and B, are present in a mixture. The boiling point of A is 60 °C and the boiling point of B is 90 °C. Suggest a method to separate them. Also, draw a labelled diagram of the method suggested. Class 9

Answer:

The boiling points of A (60°C) and B (90°C) differ by 30°C (which is more than 25°C), so simple Distillation can be used to separate them.

Process: Heat the mixture in a distillation flask. Liquid A, having the lower boiling point (60°C), vaporises first. The vapour of A passes through the condenser, where it cools and condenses back into liquid and is collected in a conical flask as the distillate. Liquid B, with the higher boiling point (90°C), remains in the distillation flask.