Soluble and insoluble
I can compare materials based on whether they are soluble or not.
Soluble and insoluble
I can compare materials based on whether they are soluble or not.
Lesson details
Key learning points
- Some solids dissolve in liquids to form a solution.
- Solutions are always clear although they may or may not have colour.
- When a solid dissolves, it is broken down to become so tiny we can no longer see it, but it is still there.
- A substance that dissolves is said to be soluble.
- A substance that does not dissolve is said to be insoluble.
Common misconception
Dissolving is the same as melting.
Teaching slides explain the difference between melting and dissolving.
Keywords
Dissolve - If a solid dissolves in a liquid, it mixes so completely with the liquid that it cannot be seen.
Solid - A solid is something that holds its shape and is not a liquid or a gas.
Liquid - A liquid is something that can flow, takes the shape of its container and is not a solid or a gas.
Soluble - Solids (and gases) that dissolve in a liquid are soluble.
Insoluble - Solids (and gases) that do not dissolve in a liquid are insoluble.
Equipment
See additional materials: beakers, water, teaspoons, a range of households solids e.g. sugar, salt, flour etc.
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).
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