Filtration is a technique to separate insoluble solids from a liquid by passing the mixture it is in through a filter.

A filtrate is the liquid component separated from a mixture as a result of filtration.

The insoluble component collected in the filter paper as a result of filtration is called the residue.

A component refers to a part of something, e.g. a tyre on a car.

Filtration

Combined science

Separating mixtures (including formulations)

Solutions

Crystallisation

Chromatography: paper

Interpreting chromatograms

Chromatography: separating a mixture of inks

Distillation: simple distillation

Distillation: separating a mixture of inks

Distillation: fractional distillation

Potable water

Wastewater treatment

Water sample analysis: pH

Water sample analysis: dissolved solids

Water sample analysis: distillation

In the Making Salts unit, pupils will build on their understanding of separation techniques to learn about the process of making salts and writing balanced chemical equations.

In the Separation Techniques unit, pupils learned about various methods for separating mixtures, including filtration, evaporation, distillation, and chromatography.

This unit explores purification techniques, including filtration, crystallisation, and distillation. It explains formulations, uses chromatographic methods to identify pure and impure substances, and interprets chromatograms with Rf values. The emphasis is on accurate measurements.

Separating substances

Physical activity and equipment requiring safe use

To separate insoluble solids from a liquid.

To change the chemical composition of a mixture.

To increase the temperature of a mixture.

What do we call the liquid that passes through the filter in filtration?

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.

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

Place the steps of filtration in the correct order, starting with ensuring the mixture is thoroughly mixed.

Match each label to the correct part of the diagram.

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

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

A {{}} is a material that contains two or more different substances, which can be physically separated.

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

A substance which can dissolve in a liquid.

To divide something into its different parts.

A substance which cannot dissolve in a liquid.

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

Formed when a solute dissolves in a solvent.

Match the following words to their meaning.

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

Filtration

Lesson outcome

Content guidance