O Level Chemistry (5070) Notes

Practice117 MCQs & 86 exam questions with answers & mark schemes →

Every chapter of the chemistry syllabus for Cambridge O Level 5070, in the order the book takes them. 14 lessons are published so far — each with notes, worked examples, a graph you can move, flashcards and a quiz — and more are being written.

Also called Cambridge O Level, CAIE O Level.

01

States of Matter

▸States of MatterThe particle model, changes of state, and diffusion · 20 min · 8 questions→

02

Atoms, Elements and Compounds

▸Atomic StructureShells, configuration and periodic trends · 22 min · 8 questions→▸Chemical BondingIonic, covalent, metallic — and why properties follow · 20 min · 8 questions→

03

Stoichiometry

▸StoichiometryMoles, equations and limiting reagents · 20 min · 8 questions→

04

Electrochemistry

▸Redox & ElectrolysisElectron transfer, and using electricity to split compounds apart · 22 min · 8 questions→

05

Chemical Energetics

▸Energy ChangesExothermic and endothermic reactions, and where the energy comes from · 20 min · 8 questions→

06

Rate of Reaction

▸Rates of ReactionCollision theory, and the four things that speed a reaction up · 20 min · 8 questions→

07

Reversible Reactions and Equilibrium

▸Reversible Reactions & EquilibriumReactions that run both ways, and how to push them where you want · 20 min · 8 questions→

08

Acids, Bases and Salts

▸Acids, Bases & SaltsThe pH scale, neutralisation, and how salts are made · 22 min · 8 questions→

09

The Periodic Table

▸The Periodic TableGroups, periods, and the trends that let you predict a reaction · 22 min · 8 questions→

10

Metals

▸Metals & the Reactivity SeriesOrdering metals by how readily they react — and why it decides extraction · 22 min · 8 questions→

11

Chemistry of the Environment

▸Chemistry of the EnvironmentWhat air is made of, the pollutants we add, and treating water · 20 min · 8 questions→

12

Organic Chemistry

▸Organic ChemistryCrude oil, hydrocarbons, and the molecules that make plastics · 24 min · 13 questions→

13

Experimental Techniques and Analysis

▸Experimental TechniquesSeparating mixtures, and testing what you have made · 20 min · 8 questions→

Frequently asked questions

What does O Level Chemistry (5070) cover?

All 13 chapters — States of Matter, Atoms, Elements and Compounds, Stoichiometry, and more. The finished lessons carry notes, worked examples, an interactive diagram and a quiz; the remaining topics are mapped and being written.

Which syllabus do these Chemistry notes follow?

The Cambridge O Level Chemistry (5070) syllabus, topic by topic — the same specification your exam is set from.

Are there practice questions or past-paper-style questions?

Yes — 117 multiple-choice questions and 86 exam-style questions with mark schemes, all with answers, on the O Level Chemistry (5070) practice page.

Are the O Level Chemistry (5070) notes free?

Yes — completely free, with no sign-up or login. Every topic has notes, worked examples, an interactive diagram you can change, flashcards and a quiz that explains each answer.