Secondary / Study notes
Combined Science Chemistry
All Chemistry coursesChoose a chapter to learn it step by step, or open its summary for revision.
O-Level 5086 / 5088 (2026) / SEC G3 K326 / K328 (2027)
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13 chaptersYour place stays on this browser.
01
Experimental Chemistry
Select apparatus, separate mixtures and judge what measurements actually show.
02
Particles and Atoms
From changes of state to counting the particles in atoms and ions.
03
Bonding and Structure
Explain material properties through particles, attractions and moving charges.
04
Chemical Calculations
Turn formulae, measurements and equations into defensible numerical answers.
05
Acid-Base Chemistry
Use ions and reaction patterns to explain acids, bases and salts.
06
Qualitative Analysis
Identify ions and gases using observations that distinguish them.
07
Redox Chemistry
Track electrons through reactions, electrolysis and electricity-producing cells.
08
Periodicity and Metals
Find patterns in the Periodic Table and use evidence to predict reactions.
09
Chemical Energetics
Explain temperature changes and the energy cost of rearranging particles.
10
Rate of Reactions
Explain why reactions speed up, and read what a progress graph actually proves.
11
Organic Chemistry
Recognise molecular families and connect structures, reactions, fuels and materials.
12
Maintaining Air Quality
Connect atmospheric substances to their sources, effects and possible solutions.
13
Data and Experimental Skills
Read unfamiliar evidence, make useful measurements and explain what a result can support.