Question

How will you separate a mixture containing kerosene and petrol (the difference in their boiling points is more than$25º\mathrm{C}$), which are miscible with each other?

Answer 1

Simple Distillation:

• It is a method of separation of mixtures based on the volatile nature of boiling points.
• In this method, the mixture is vaporized and then immediately cooled with the help of a condenser.
• This method is used to separate a combination of two miscible liquids with boiling points that differ by more than $25°\mathrm{C}$
• The boiling point of kerosene $=$ around $150–180°\mathrm{C}$
• The boiling point of petrol $=$ $95°\mathrm{C}$
• So, the mixture of Petrol and kerosene can be separated using a simple distillation method.

Procedure:

• In this process, kerosene and gasoline are combined in a distillation flask with a thermometer.
• Other components include a beaker, water condenser, and Bunsen burner as shown above.
• The combination is progressively heated; because petrol has a lower boiling point than kerosene, it will first vaporize and condense in the water condenser.
• Condensed petrol is collected from the condenser outlet, while kerosene remains in the distillation flask.

Thus, in this way, a mixture containing kerosene and petrol is separated.