Distillation

Question 1

What is the purpose of simple distillation?

Answer 1

To separate out a liquid from a solution

Question 2

Describe the process of simple distillation.

Answer 2

• Heat distillation flask with solution in - part of solution that has the lowest boiling point will evaporate
• Vapour will pass into condenser where it condenses, turning back into liquid - it then flows into the beaker where it is collected

Question 3

State one problem with using simple distillation.

Answer 3

It can only be used to separate things with very different boiling points

Question 4

What is the purpose of fractional distillation?

Answer 4

To separate a mixture of liquids with similar boiling points

Question 5

Describe the process of fractional distillation.

Answer 5

• Heat flask with mixture in - the liquid with the lowest boiling point evaporates first
• Vapour passes through condenser and is condensed, turning back into liquid - each of the liquids in the mixture are collected in different test tubes
• Once first liquid has been collected, raise temperature so next liquid can be evaporated