Last Updated Sep 27, 2025

Filtration & Simplified Revision Notes for GCSE Edexcel Chemistry Combined Science

Revision notes with simplified explanations to understand Filtration & quickly and effectively.

Learn about Filtration & Crystallisation for your GCSE Chemistry Combined Science Exam. This Revision Note includes a summary of Filtration & Crystallisation for easy recall in your Chemistry Combined Science exam

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Filtration & Crystallisation

Filtration

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Filtration separates an insoluble solid from a liquid reaction mixture. It's often used for purification, to remove solid impurities from a liquid.

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Method:

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Example: Separating sand from a mixture of sand and water.

Crystallisation

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Crystallisation separates a soluble solid from a solution. It is commonly used to obtain pure crystals of a dissolved substance.

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Method:

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Example: Separating salt from saltwater.

Comparison of Filtration and Crystallisation:

Process	Separates	Examples	Method Summary
Filtration	Insoluble solid from liquid	Sand from water	Pour through filter paper, solid stays, liquid passes through.
Crystallisation	Soluble solid from solution	Salt from saltwater	Heat solution, form crystals, filter and dry crystals.

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