5.1.1.2 Mixtures

Question 1

What does a mixture consist of?

Answer 1

• two or more elements or compounds not chemically combined together

Question 2

What are the chemical properties of each substance in the mixture?

Answer 2

• unchanged

Question 3

How can mixtures be separated?

Answer 3

• physical processes
• e.g. filtration
• e.g. crystallisation
• e.g. simple distillation
• e.g. fractional distillation
• e.g. chromatography

Question 4

What do the separation methods NOT involve?

Answer 4

• chemical reactions
• new substances

Question 5

When can filtration get used to separate a mixture?

Answer 5

• when you have a mixture of an insoluble solid and a liquid

Question 6

How does filtration work?

Answer 6

• passing mixture through a filter
• liquid passes straight through but insoluble solid particles are caught by filter

Question 7

When is crystallisation used to separate a mixtures?

Answer 7

• to separate a soluble solid from a solution