C1.3 Separating mixtures

Question 1

What does a mixture contain

Answer 1

Contains two or more substances that are not chemically bonded together.

Question 2

What methods can you use to separate substances in a mixture from each other

Answer 2

• Filtration
• Crystallisation
• Distilation
• Chromatography

Question 3

What is filtration

Answer 3

A separation technique used to separate an insoluble solid from a liquid.

Question 4

What is crystallisation

Answer 4

A separation technique used to obtain a soluble solid (solute) from its solution by evaporating the solvent to form crystals

Question 5

What is distillation

Answer 5

A separation technique that separates a soluble solid from a solution or separates a solvent from a solution.

Question 6

How does distillation work

Answer 6

By boiling the solution and then condensing the vapour back into a liquid by cooling it down.

Question 7

How does crystallisation work

Answer 7

By dissolving for example water, to create a solution. The solution is then cooled or allowed to evaporate slowly, so the dissolved substance forms solid crystals.

Question 8

How does filtration work

Answer 8

It separates an insoluble solid from a liquid (like sand from water) using filter paper in a funnel