A mixture is a material that contains two or more different substances that can be physically separated.

In chemistry, to separate something is to extract and isolate a substance from a mixture.

A property is a feature or characteristic of a substance that can be used to classify it or describe how it behaves.

Separating mixtures

Chemistry

Solutions

Filtration

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: including sedimentation

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

A material with two or more different substances physically combined.

To extract and isolate a substance from a mixture.

A feature or characteristic of a substance.

Match the following terms with their correct definitions.

Components in a mixture lose their original properties.

Mixtures can be separated by physical methods.

Mixtures are substances with uniform composition.

Each component in a mixture forms new chemical bonds.

Which of these is a true statement about mixtures?

The melting point data of a substance can help distinguish a pure substance from a...

Which of the following is **not** a correct use of the term 'pure' in scientific context?

Order the following steps used in separating a mixture. Start by identifying the components.

In a mixture, the chemical {{}} of each substance remains unchanged.

Compounds can be broken down into simpler chemicals.

Compounds are always liquid at room temperature.

Elements contain multiple types of atoms.

In chemistry, what distinguishes a compound from an element?

Order the states of matter from most to least freedom of movement:

Which is only a characteristic of a chemical change (compared to a physical change)?

What property measures how much matter is in a substance?

In chemistry, {{}} chemicals refer to substances that only contain one type of fundamental unit, like an atom or molecule.

Separating mixtures

Lesson outcome