UNIT OVERVIEW

This unit brings together your knowledge of acid-base reactions and redox reactions from Term 3. You will deepen your understanding, practise more challenging problems, and see how these reactions work in real life — from batteries to industrial processes.

By the end of this unit, you will be able to:

• Identify and balance acid-base and redox reactions
• Apply oxidation number rules to compounds
• Write and balance half-reactions for redox processes
• Calculate concentrations, volumes, and masses in acid-base titrations
• Use the electrochemical series to predict if reactions will happen
• Explain how galvanic and electrolytic cells work

Where you will see these reactions:

• Batteries: Car batteries use redox reactions to produce electricity
• Antacids: These medicines neutralise excess stomach acid using acid-base reactions
• Water treatment: Chlorine (made by electrolysis) disinfects drinking water
• Metal refining: Gold and other metals are purified using electrochemical processes

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