Separation techniques
What Separation techniques means in Combined Science GCSE, as defined for AQA.
Definitions of Separation techniques
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Reference: AQA
Physical processes such as filtration, crystallisation, simple distillation, fractional distillation and chromatography separate mixtures without chemical reactions.
Chromatography separates dissolved substances as they travel at different speeds through paper or a thin layer of silica.
Methods such as paper chromatography, which can be used to separate and tell the difference between coloured substances.
Topics that use Separation techniques
- Chromatography (AQA GCSE)
- Mixtures (AQA GCSE)
Related terms
- Chromatography
- Chromatogram
- Crystallisation
- Distribution between phases
- filtration
- Identification by comparison
- Identification of substances
- Identification using reference values
Using Separation techniques in the exam
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