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GCSE Chemistry · key term
Separating an insoluble solid from a liquid by passing the mixture through filter paper.
Used by AQA, Edexcel and OCR
Specification 4.10.1.2 · Paper 2
The removal of insoluble solid particles by passing water through a filtering material.
Revise: Water Treatment and PotabilityGround water may have undergone some natural filtration while passing through soil and rock, but it can still contain dissolved substances and microbes, so it must still be assessed and treated.
Specification 2.12, 3.15, 3.17, 3.21 · Paper 1
Do not claim that ordinary filtration removes dissolved salts. Dissolved particles pass through the filter with the water.
When comparing sources, explain that fresh water generally needs filtration and sterilisation, whereas salty water also needs an energy-intensive desalination stage.
Give the stages for treating waste or groundwater in order: sedimentation, filtration, then chlorination. Explain what each removes or kills.
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Passing a mixture through a material that traps insoluble solids while the liquid passes through.
Next, filtration through layers such as sand and gravel traps smaller insoluble particles that did not settle. Neither settling nor filtering removes substances that are dissolved in the water.
The separation of an insoluble solid from a liquid using filter paper.
Separating an insoluble solid from a liquid using filter paper.
A separation technique in which a mixture passes through filter paper, trapping an insoluble solid.
Specification C2.1f, C2.1j, C6.3g, PAG 4, PAG 7 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Filtration separates an insoluble solid from a liquid by passing the mixture through a filter.
Revise: Separation TechniquesFiltration works because the solid particles are retained by the filter paper while the liquid passes through. It cannot separate salt from salt solution: dissolved salt passes through with the water.
A separation technique in which an insoluble solid is trapped by filter paper while a liquid passes through.
The separation of an insoluble solid from a liquid by passing the mixture through a filter.
Filtration separates an insoluble solid from a liquid using a filter that lets the liquid pass through.
A method of separating an insoluble solid from a liquid by passing the mixture through a filter.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A separation technique in which a physical barrier retains insoluble solid particles while water passes through.
Revise: Potable water methodsFiltration separates an insoluble solid from a liquid. Water passes through a physical barrier, while particles too large to pass through are trapped. Before fine filtration, screens may remove large objects and sedimentation may allow heavier solids to settle.
A method of separating an insoluble solid from a liquid by passing the mixture through a filter.
A physical method of separating an insoluble solid from a liquid using filter paper.