A single element or compound that is not mixed with any other substance.

The process of killing bacteria and other living microorganisms.

The process of removing dissolved salts from seawater.

The movement of solvent through a semipermeable membrane by applying excess pressure on the solution. This process can remove dissolved solutes from water.

Potable water

Combined science

Separating mixtures (including formulations)

Solutions

Filtration

Crystallisation

Chromatography: paper

Comparing types of chromatography: including gas chromatography

Interpreting chromatograms

Chromatography: separating a mixture of inks

Distillation: simple distillation

Distillation: separating a mixture of inks

Distillation: fractional 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

Water is essential for life. 
Which of the following are domestic uses of water?

All sources of water contain varying amounts of micro-organisms and what other material?

Water that is safe to drink is classified as {{}}.

a grid acts like a sieve, removing large insoluble objects

small, insoluble particles 'settle out', forming a sediment

very small particles are removed by passing through fine layers

Match each step of making potable water, from either groundwater or freshwater, to the correct description.

Which of the following could be used to sterilise a water sample to ensure it is potable?

Put the following stages of creating potable water from groundwater or freshwater in the correct order.

The equipment setup shown below shows which separation technique?

Match each letter on the diagram below to the correct label.

A single element or compound that is not mixed with any other substance is said to be {{}}.

A substance that dissolves into another substance is described as {{}}.

When a substance dissolves into a liquid (e.g., water), a __________ forms.

Which of the following techniques can be used to fully isolate components of a mixture or solution?

Potable water

Lesson outcome