a rod of metal or graphite through which an electric current flows in and out of an electrolyte

a liquid or solution that contains freely moving ions

a process that uses electricity to break down a compound

Principles of electrolysis

Combined science

In the Using Earth's Resources unit, pupils learned about the extraction, production and uses of hydrocarbons from crude oil, as well as metal extraction.

This unit focuses on electrolysis, electrode reactions, and predicting products, including competing reactions in solutions. It explains metal extraction through electrolysis and writing ionic equations. It also covers tests for gases like oxygen, hydrogen, carbon dioxide, and chlorine.

Electrolysis

It is the negative electrode where positive particles gain electrons.

It is the positive electrode where negative particles gain electrons.

It is the positive electrode where positive particles lose electrons.

What is the role of the cathode in electrolysis?

What occurs at the anode during electrolysis?

both positive and negative ions that can move

It involves chemical changes driven by electricity.

It involves physical processes like filtration.

Why is electrolysis not a physical separation method?

a process that uses electricity to breakdown a compound

a rod of metal or graphite through which an electric current flows

What particles are found in the nucleus of an atom?

What type of ions do metals typically form?

How do non-metals achieve a full outer shell?

This lesson will be removed by end of Summer Term 2025.

Principles of electrolysis

Lesson outcome

This lesson will be removed by end of Summer Term 2025.