Separation techniques

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Chemistry

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GCSE Chemistry

AQA

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6 Terms

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Crystallisation

Used to get soluble solid from a solution

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Crystallisation example

Get salt crystals from salt water

The mixture is gently warmed

The water evaporates leaving behind crystals or pure salt

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Filtration

Used to separate soluble solids from insoluble solids

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Simple distillation

Used to get solvent from a solution

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Process of distillation

Distillation is a separation technique that purifies liquids by heating the mixture, collecting the vapour of the component with the lowest boiling point, and leaving behind impurities.

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Chromatography

Used to separate the different soluble solids in a solution

The more soluble components travel up the chromatogram