Separating soluble solids from solutions
I can describe how to separate a soluble solid from a solution.
Separating soluble solids from solutions
I can describe how to separate a soluble solid from a solution.
Lesson details
Key learning points
- A solid that dissolves in a liquid is called soluble. This makes a solution.
- Soluble solids can not be recovered using filtering.
- Soluble solids can be recovered from a liquid using evaporation.
- Evaporation is when a liquid changes to invisible water vapour (gas) in the air.
Common misconception
A dissolved solid ceases to be present in the solution it forms – it turns into water. When you pass salt water through a filter paper, the salt is removed.
Children carry out practical activities to discover which methods can and cannot be used to recover salt from a solution.
Keywords
Dissolve - If a solid or gas dissolves in a liquid, it mixes so completely with the liquid that it cannot be seen.
Soluble - Solids and gases that dissolve in a liquid are soluble.
Solution - A solution is a mixture of a liquid with a dissolved solid or gas.
Separate - To separate something, you put different parts of it into different groups.
Evaporate - To evaporate is to change from a liquid to a gas.
Equipment
See additional materials: beakers, spoons, filter papers, funnels, salt, sugar or other soluble solids, water, equipment to carry out evaporation.
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).
Video
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Starter quiz
6 Questions
Exit quiz
6 Questions
evaporating
filtering
sieving
