Soluble and insoluble substances

Home learning focus

Learn about soluble and insoluble substances.

This lesson includes:

  • one video that gives an overview of what soluble and insoluble means
  • one investigation


Watch this video from BBC Teach which explains the differences between soluble and insoluble substances.

Soluble and insoluble substances

If a substance is soluble, this means it is able to dissolve.

  • The substance that dissolves is called the solute.
  • The substance that the solute dissolves into is called the solvent.

The particles from the dissolved solute and solvent will produce a mixture.

A solute will create a mixture of particles with a solvent.

If a substance can't dissolve then we say it is insoluble.

However, substances can be both soluble and insoluble. It just depends on the solute they are placed in.

For example, sand is insoluble in water but is soluble (will dissolve) in strong acid.


There are lots of ways to try out your science skills.

Activity 1

Dissolving investigation

Carry out a dissolving investigation with this downloadable worksheet from Beyond. Record your observations and answers on a piece of paper.

Don't worry if you don't have all the substances required, just use what you have available.

Dissolving investigation

There's more to learn

Have a look at these other resources around the BBC and the web.

KS3 Chemistry
11-14 Chemistry
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