Distillation: simple distillation | Combined science | Quizalize & Oak National Academy

Starter quiz

Which of the following processes describes when a substance in the liquid state turns into the gas state?

melting

boiling ✓

condensing

evaporating ✓

freezing
Which property of matter does not change when a substance changes state?

shape

volume

mass ✓

state
What laboratory equipment is used to measure the volume of liquids accurately?

Bunsen burner

beaker

measuring cylinder ✓

balance

conical flask
True or false? The boiling point of a liquid is the temperature at which it becomes a gas.

True ✓

False
Sort the following substances from the one which will boil first to the substance which will boil last when heated.

1

⇔

ethanol boils at 78°C

2

⇔

water boils at 100°C

3

⇔

sodium chloride boils at 1465°C

4

⇔

aluminium boils at 2519°C
Match up the processes below to their descriptions.

evaporation

⇔

where a liquid turns into a gas at the substance's surface ✓

boiling

⇔

where a liquid turns into a gas at a specific temperature ✓

condensation

⇔

where a gas is changed into a liquid ✓

What is the purpose of simple distillation?

to mix substances

to separate substances based on boiling points ✓

to increase the boiling point of a liquid

to change the colour of the solution
True or false? The condenser in a distillation setup is used to heat the mixture.

True

False ✓
What state is the distillate in when collected?

solid

liquid ✓

gas
During distillation, when does a substance with a lower boiling point boil?

after the substance with a higher boiling point

before the substance with a higher boiling point ✓

at the same time as the substance with a higher boiling point

never
True or false? Simple distillation is best used for separating mixtures with significantly different boiling points.

True ✓

False
Distillation separates a soluble substance from its solvent based on differences in ______.

'boiling point' ✓

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Distillation separates a soluble substance from its solvent based on differences in boiling points.
Distillation requires multiple pieces of apparatus which work in conjunction with each other.
The processes of boiling and condensing are involved in the process of distillation.
Simple distillation is used primarily to separate mixtures of only two components.

Pupils to understand gas state; thinking solids, liquids and gases as 'types' of matter.

Refer to/use particle models to help clarify different states of matter and use these to describe why separation techniques work.

Boiling - Boiling occurs when a substance in the liquid state is heated and changes to the gas state with gas bubbles formed.
Condensation - Condensation is the process by which a substance in the gas state is cooled and changes to a liquid state.
Distillation - Distillation is a separation technique that uses boiling and condensation to remove and isolate a liquid component of a mixture.
Condenser - A condenser is a piece of apparatus composed of a tube surrounded by a cold layer, usually cold water.
Distillate - A distillate is the condensed component that has been isolated during distillation.