Topic 01
Being written
States of matter
Particle model, changes of state, the heating curve and diffusion.
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Cambridge IGCSE 0620 & 0971
Past paper solutions, chapter by chapter
Every question worked through and set out the way the mark scheme reads it, filed under the syllabus chapter it belongs to. Pick a chapter and it opens in Google Drive, so you can read it on a phone, download it, or print it the night before the paper.
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Topic 02
Being written
Atoms, elements and compounds
Atomic structure, isotopes, electron shells, ionic, covalent and metallic bonding.
Topic 03
Being written
Stoichiometry
Formulae, balanced equations, relative masses, the mole and reacting masses.
Topic 04
Being written
Electrochemistry
Electrolysis of molten and aqueous compounds, electrode products and half equations.
Topic 05
Being written
Chemical energetics
Exothermic and endothermic change, pathway diagrams and bond energy.
Topic 06
Being written
Chemical reactions and redox
Rate of reaction, collision theory, reversible reactions, equilibrium and redox.
Topic 07
Being written
Acids, bases and salts
Acid and base properties, pH, indicators, oxides, salt preparation and titration.
Topic 08
Being written
The Periodic Table
Groups and periods, Group I, Group VII, transition elements and noble gases.
Topic 09
Being written
Metals and extraction
Properties and alloys, the reactivity series, extraction, rusting and its prevention.
Topic 10
Being written
Chemistry of the environment
Water treatment and testing, fertilisers, air quality and climate change.
Topic 11
Being written
Organic chemistry
Homologous series, crude oil, alkanes, alkenes, alcohols, acids and polymers.
Topic 12
Being written
Experimental techniques and analysis
Measurement, purity, separation, chromatography and the tests for ions and gases.
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Chapters marked "being written" are on the way. The solutions are MrChemCoach's own worked answers; the original Cambridge question papers stay with Cambridge Assessment International Education.