A device that contains a store of chemicals that react to produce a voltage across two electrical contacts.

This is a measure of the difference in energy between two parts of a circuit. It is measured in volts.

A liquid or aqueous salt solution that contains freely moving ions.

An electric cell, or several cells joined together in series, that can push current around a complete circuit to transfer energy to each component.

Electric cells and batteries

Chemistry

Principles of electrolysis

Electrolysis of molten salts

Electrolysis: extracting aluminium

Electrolysis of aqueous solutions

Electrolysis: brine

Electrolysis: aqueous solutions practical

Electrolysis: purifying copper

Half equations: electrolysis

Fuel cells

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

What do electric cells contain that react to produce a voltage?

How are electric cells connected to form a battery?

The voltage produced by an electric cell depends on ...

What is the total voltage of a circuit with three electric cells of voltage 2.0 V, 1.5 V, and 1.0 V connected in series to form an electric battery?

What happens in a rechargeable battery when an external voltage is applied?

What is the purpose of connecting electric cells in series?

What is the primary function of an electric cell?

In electrolysis, what type of ions does the anode attract?

What type of reaction occurs in an electric cell to produce a voltage?

What are the two types of terminals in an electric cell?

What happens if the circuit is incomplete?

Which component in a circuit can be used to control the flow of electricity?

Electric cells and batteries

Lesson outcome