Chemical Changes: Exam Practice

This lesson provides a comprehensive revision and exam practice session covering all topics in the AQA GCSE Chemistry Chemical Changes unit (4.4). It brings together the reactivity series, extraction of metals, oxidation and reduction, acids and bases, neutralisation, salt preparation, strong and weak acids, and electrolysis. Use this lesson to consolidate your knowledge, identify gaps, and practise the types of questions you will encounter in the exam.

---

Topic Overview

The Chemical Changes unit covers the following key areas:

graph TD
    A["AQA GCSE Chemistry<br/>Chemical Changes (4.4)"] --> B["4.4.1 Reactivity<br/>of Metals"]
    A --> C["4.4.2 Reactions of<br/>Acids"]
    A --> D["4.4.3 Electrolysis"]
    B --> E["Reactivity Series"]
    B --> F["Extraction of Metals"]
    B --> G["Oxidation & Reduction"]
    C --> H["Acids & Bases"]
    C --> I["Neutralisation &<br/>Salt Preparation"]
    C --> J["Strong & Weak<br/>Acids (H)"]
    D --> K["Electrolysis of<br/>Molten Compounds"]
    D --> L["Electrolysis of<br/>Aqueous Solutions"]

    style A fill:#4a90d9,color:#fff
    style B fill:#e74c3c,color:#fff
    style C fill:#27ae60,color:#fff
    style D fill:#f39c12,color:#fff

---

Key Definitions to Remember