Filtration | Chemistry | Quizalize & Oak National Academy

Starter quiz

Which substances are insoluble (do not dissolve) in water?

sugar

sand ✓

salt

flour ✓
A ______ is a material that contains two or more different substances, which can be physically separated.

'mixture' ✓
What mixture is formed when a substance dissolves in a liquid?

solution ✓

suspension

insoluble

soluble

solvent
Match the following words to their meaning.

Soluble

⇔

A substance which can dissolve in a liquid. ✓

Separate

⇔

To divide something into its different parts. ✓

Insoluble

⇔

A substance which cannot dissolve in a liquid. ✓

Solvent

⇔

The liquid in which a solute is dissolved to form a solution. ✓

Solution

⇔

Formed when a solute dissolves in a solvent. ✓
Which of the following are mixtures?

'pure' orange juice ✓

oxygen

air ✓

sodium chloride (salt)

carbon
When a solid substance is insoluble, it can still form a mixture with a liquid. This mixture is called a ...

'suspension' ✓

Exit quiz

What is the purpose of filtration?

To dissolve solids in a liquid.

To separate insoluble solids from a liquid. ✓

To change the chemical composition of a mixture.

To increase the temperature of a mixture.

To mix two liquids together.
What do we call the liquid that passes through the filter in filtration?

residue

component

filtrate ✓

mixture

solvent
What's the main difference between a funnel and a filter?

A funnel separates materials; a filter does not.

A funnel and a filter serve the same purpose.

A funnel directs flow; a filter separates materials. ✓

A funnel increases mixture temperature; a filter does not.

A funnel is used for heating; a filter is used for cooling.
Place the steps of filtration in the correct order, starting with ensuring the mixture is thoroughly mixed.

1

⇔

Swirl the mixture in a flask.

2

⇔

Wet the filter paper.

3

⇔

Pour the mixture into the filter paper.

4

⇔

Collect the filtrate and residue.
Match each label to the correct part of the diagram.

a

⇔

filtrate ✓

b

⇔

funnel ✓

c

⇔

filter paper ✓

d

⇔

residue ✓
In filtration, the smallest particles will become part of the ...

'filtrate' ✓

Worksheet

Loading worksheet ...

Presentation

Loading presentation ...

Video

Lesson Details

Key learning points

Filtration is a technique used to separate insoluble substances from a mixture with a liquid.
Separation in filtration occurs due to the difference in size of particles.
The terms 'filtrate' and 'residue' describe the components separated by the process of filtration.

Common misconception

A funnel is the same as a filter.

A funnel streamlines movement, while a filter separates materials. Use everyday examples to highlight the difference, e.g. an oil funnel vs. an oil filter, or a coffee funnel vs. a coffee filter.

Keywords

Filtration - Filtration is a technique to separate insoluble solids from a liquid by passing the mixture it is in through a filter.
Filtrate - A filtrate is the liquid component separated from a mixture as a result of filtration.
Residue - The insoluble component collected in the filter paper as a result of filtration is called the residue.
Component - A component refers to a part of something, e.g. a tyre on a car.