GCSE Chemistry Topic 4: Chemical Changes, Acids and Electrolysis (One-Page Sheet)

Part of All of GCSE Chemistry on 11 Sheets, the free examiner-made series. Made by Fiaraz Iqbal, Former Headteacher & Examiner. Works for AQA, Edexcel and OCR.

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← Topic 3: Quantitative ChemistryTopic 5: Energy Changes →

Frequently asked questions

What is made when an acid reacts with a metal carbonate?

A salt, water and carbon dioxide.

What happens at the cathode in electrolysis?

Positive ions gain electrons, so reduction takes place.

The rest of the series

Annotated Periodic TableGroups, ions, reactivity, formulae and Mr in one annotated table.Topic 1: Atoms, Elements and MixturesAtomic structure, isotopes, electron shells and separation techniques.Topic 2: Bonding, Structure and PropertiesIonic, covalent and metallic bonding and how structure explains properties.Topic 3: Quantitative ChemistryMoles, Mr, yield, atom economy and concentration calculations.Topic 5: Energy ChangesExo/endothermic reactions, reaction profiles, bond energies and cells.Topic 6: Rates and EquilibriumCollision theory, catalysts, reversible reactions and equilibrium.Topic 7: Organic ChemistryCrude oil, alkanes, alkenes, alcohols, acids and polymers.Topic 8: Chemical AnalysisPurity, chromatography, gas tests and ion tests.Topic 9: Chemistry of the AtmosphereAtmosphere evolution, greenhouse effect and pollutants.Topic 10: Using ResourcesPotable water, LCA, recycling, alloys, Haber process and fertilisers.

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