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Tutorial Course

GCSE Chemistry — Chemical Changes

Led by Antoine Lavoisier

1 modules ~9 hours of tutorial Chemistry Updated today

Module 6 of Edexcel GCSE Chemistry — the largest module in Paper 1. Led by Antoine Lavoisier, founder of modern chemistry through conservation of mass and the oxygen theory of combustion. The student covers acids and alkalis, the pH scale, neutralisation, salt preparation including three Core Practicals, solubility rules, electrolysis, oxidation and reduction.

Chemical Changes6
  1. Module 6

    Chemical Changes

    Led by Antoine Lavoisier

    The question

    What is an acid, what is an alkali, what happens when they neutralise each other, how does a chemist prepare a pure dry sample of a desired salt, and how does electrical energy decompose ionic compounds during electrolysis? The spec asks the student to define acids and alkalis in terms of H⁺ and OH⁻, apply the pH scale, write the four acid-reaction patterns, prepare soluble and insoluble salts, apply solubility rules to predict precipitates, predict the products of electrolysis for the required electrolytes, write half-equations (Higher), and apply oxidation and reduction in terms of electron transfer.

    Outcome

    the student can apply the acid-base framework and pH scale, write the four acid-reaction patterns and identify gases by chemical tests, prepare salts by three routes, apply solubility rules to predict precipitates, predict electrolysis products for the required electrolytes, write half-equations and apply OIL RIG, and execute Core Practicals 3.6, 3.17, and 3.31. *(Edexcel 1CH0 Paper 1 — Topic 3, spec points 3.1–3.31)*

    Sub-units

    1. ○ 6.1 Acids, alkalis, and the pH scale
    2. ○ 6.2 Indicators, neutralisation, and the four acid-reaction patterns
    3. ○ 6.3 Salt preparation: acid + insoluble base (Core Practical 3.17)
    4. ○ 6.4 Salt preparation: titration and precipitation
    5. ○ 6.5 Electrolysis: cathode, anode, ion migration
    6. ○ 6.6 Electrolysis products for the required electrolytes
    7. ○ 6.7 Oxidation and reduction; half-equations (Higher)
    8. ○ 6.8 Core Practical 3.31: electrolysis of copper sulfate