AQA (KS4)

KS3 & KS4 science curriculum

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Exam subject (KS4)

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Science
Year 7

Separation techniques

7 lessons

Threads

  • BQ06 Chemistry: How do we explain how substances behave?
  • BQ08 Chemistry: How can substances be made and changed?

Description

This unit covers techniques for separating mixtures, including filtration, evaporation, distillation, and chromatography, as well as identifying pure substances. Conduct experiments safely, record observations, evaluate methods, and suggest improvements.

This unit builds on pupils’ prior learning from Properties, changes and separating materials, where they explored material properties and methods of separation. It focuses on techniques like filtration, evaporation, and distillation to separate mixtures based on their properties. This prepares pupils for the next unit, Understanding chemical reactions, where they will apply this knowledge to explore how substances interact and change during chemical reactions, deepening their understanding of material behaviour.

  1. Separating an insoluble solid from a liquid
  2. Separating a soluble solid from a liquid
  3. Separating pure salt from dirty rock salt
  4. Separating liquids
  5. Simple distillation
  6. Distillation: practical
  7. Chromatography

  • Some materials change state when they are heated or cooled.
  • Some materials will dissolve in liquids to form a solution, and how to recover a substance from a solution.
  • Dissolving is a reversible state.
  • Use knowledge of solids, liquids and gases to decide how mixtures might be separated.

91 units shown,

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