Recovering insoluble solids
I can describe how to separate an insoluble solid from a liquid.
Recovering insoluble solids
I can describe how to separate an insoluble solid from a liquid.
Lesson details
Key learning points
- Some solids do not dissolve in liquids; these are called insoluble solids.
- A sieve is a type of filter that can be used to separate larger insoluble solids from a liquid.
- Different types of filters can be used to separate insoluble solids from liquids or gases.
- We use filters in everyday life to separate mixtures of solids and liquids.
Keywords
Dissolve - If a solid dissolves in a liquid, it mixes completely with the liquid so that you can no longer see it.
Insoluble - Solids or gases that do not dissolve in a liquid are called insoluble.
Separate - To separate something means to divide it into different parts or groups.
Filter - To filter means to pour a mixture of liquid and solid through a fine mesh to separate the solid particles from the liquid.
Sieve - A sieve is a tool with a mesh of holes that lets smaller pieces pass through while keeping larger pieces behind.
Common misconception
Insoluble and soluble solids are separated from liquids using the same methods: dissolved solids, like salt and sugar, can be removed from solution by filtering.
Methods specific to the separation of insoluble solids are taught and applied in this lesson. Task A will help pupils understand that filtering does not separate dissolved solids, like salt and sugar, from a solution.
Equipment
See additional materials.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
can be dissolved in water or another liquid
cannot be dissolved in water or another liquid
Exit quiz
6 Questions
