Mixtures + Separiting Techniques

Question 1

What is a mixture ?

Answer 1

A mixture is a collection of elements and / or compounds not chemically bonded together .

Question 2

How could I separate a mixture of iron and sulphur?

Answer 2

Use a magnet

Question 3

Could you separate iron sulphide ?

Answer 3

No it’s a compound and not magnetic

Question 4

What is filtration used for ?

Answer 4

Used to separate an insoluble ( does not dissolve) solid from a liquid

e.g - sand + water , chalk + water , tea leaves + water

Question 5

What’s evaporation ( and crystallisation ) used for ?

Answer 5

Used to separate a soluble ( will dissolve) from a liquid ( solvent )

e.g - salt from water or sugar from water

Question 6

What is simple distillation used for ?

Answer 6

Used to separate a liquid from its solution

e.g - separate water from a salt solution

Question 7

What is fractional distillation used for ?

Answer 7

Used to separate a mixture of liquids