Recovering insoluble solids | Science | Quizalize & Oak National Academy

Starter quiz

Which of these materials are in the liquid state at room temperature (20 ºC)?

brick

vinegar ✓

water ✓

oxygen
What is the name of the process when a substance changes from the solid to the liquid state?

condensing

boiling

melting ✓

freezing
When a solid dissolves in a liquid, a ______ is produced.

'solution' ✓
In a solution, when a solid dissolves in a liquid…

you can see small pieces of the solid within the liquid.

you can see small pieces of the solid floating on the liquid.

you cannot see any of the solid. ✓
Match the following key words to their definition.

soluble

⇔

can be dissolved in water or another liquid ✓

insoluble

⇔

cannot be dissolved in water or another liquid ✓
You have three mixtures of solids in front of you. Based on their appearance, which ones could be solutions?

a transparent, colourless liquid ✓

an opaque, white liquid

a transparent, orange liquid ✓

Exit quiz

A solution is a mixture where one substance is ______ into another substance, such as a solid into a liquid.

'dissolved' ✓
If a solid does not dissolve in a liquid it is said to be ______.

'insoluble' ✓
A ________ is a piece of equipment used to separate insoluble solids from liquids in our everyday lives.

beaker

force meter

battery

filter ✓
What is a sieve?

a type of solution

a type of filter ✓

a type of liquid
Which of these mixtures could be separated using a sieve?

vegetables in water ✓

salt dissolved in water

sugar dissolved in water

sand in water ✓
What is the name of the method used to separate insoluble solids from a liquid or a gas?

evaporation

filtration ✓

distillation

condensation

Worksheet

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Presentation

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Video

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.

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.

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.