Contents

States of matter

Atoms, elements and compounds

Stoichiometry

Electrochemistry

ElectrolysisBeing prepared
Electrolysis of solutions and electroplatingBeing prepared
Fuel cellsBeing prepared

Chemical energetics

Chemical reactions

Acids, bases and salts

Acids, bases and indicators
OxidesBeing prepared
Making saltsBeing prepared

The Periodic Table

Reading the tableBeing prepared
Group I: the alkali metalsBeing prepared
Group VII: the halogensBeing prepared
Transition elements and noble gasesBeing prepared

Metals

Metals and alloysBeing prepared
The reactivity seriesBeing prepared
CorrosionBeing prepared
Extracting metalsBeing prepared

Chemistry of the environment

WaterBeing prepared
FertilisersBeing prepared
Air quality and climateBeing prepared

Organic chemistry

Naming organic moleculesBeing prepared
Crude oil and alkanesBeing prepared
AlkenesBeing prepared
Alcohols and carboxylic acidsBeing prepared
PolymersBeing prepared

Experimental techniques and chemical analysis

Mixtures and separation
Measuring and planning experimentsBeing prepared
Crystallisation
Distillation
Paper chromatography
Choosing methods and checking purityBeing prepared
TitrationBeing prepared
Gas testsBeing prepared
Anion testsBeing prepared
Cation and flame testsBeing prepared

Part 2 of 3

Page 02

Pink or blue? Both ways at once

state

Try it yourself

Supplement. Which two statements are true of a reversible reaction at equilibrium in a closed system?

state: choose the short, clear answers.

Choose two answersa.There are equal amounts of reactants and productsb.The forward and reverse reactions have stoppedc.The rate of the forward reaction equals the rate of the reverse reactiond.The concentrations of the reactants and products no longer change

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Scope and sources

Cambridge IGCSE Chemistry 0620 · 2026–2028 v2 · Original learning materials.

Reversible reactions and equilibrium (6.3 Core 1 and 2; Supplement 3 to 11): the reversible sign, hydrated and anhydrous salts and the water tests, dynamic equilibrium in a closed system, how changing the conditions moves its position, and the Haber and Contact processes. Energy changes are in ENER01, collision theory and catalysts in RATE01, and fertilisers in FERT01.

Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.

Official Cambridge syllabus