2.2 Methods of separating and purifying substances

Question 1

How can you tell the difference between pure substances and mixtures by boiling points?

Answer 1

Pure substances have exact boiling points and melt at specific temperatures, mixtures do not.

Question 2

What is simple distillation used for?

Answer 2

Used to separate a pure liquid from a mixture of liquids.

Question 3

When will simple distillation work?

Answer 3

It will work when the liquids have different boiling points

Question 4

What is simple distillation commonly used for?

Answer 4

Separating ethanol from water

Question 5

What can the fractions from fractional distillation be used for?

Answer 5

These can be used to produce fuels and feedstock for the petrochemical industry

Question 6

What is paper chromatography used for?

Answer 6

.Used to separate mixtures and give information to help identify substances