This guide gathers free SPM Chemistry resources: Form 4 and Form 5 topics, exam help, revision and a glossary. It is written to help you connect particles, equations and calculations.
What this subject covers
Chemistry explains matter at three levels. The particle level describes atoms, ions and molecules, the equation level records the reaction, and the numbers level counts amounts.
The levels depend on each other. A student who skips the particle picture can still balance an equation by trial, but rarely explains it, and a wrong mole ratio breaks every calculation after it.
An example to start with
Here is a worked example, written for illustration.
20 cm³ of 1.0 mol dm⁻³ sodium hydroxide is neutralised by hydrochloric acid of the same concentration. What volume of acid is needed?
Particles. Hydroxide ions from the alkali react with hydrogen ions from the acid to form water.
Equation. NaOH + HCl → NaCl + H₂O. The ratio is 1 : 1.
Numbers. Moles of NaOH = 1.0 × 20 ÷ 1000 = 0.02 mol. The acid also needs 0.02 mol, so volume = 0.02 ÷ 1.0 × 1000 = 20 cm³.
The answer is sensible because the ratio is 1 : 1 and the concentrations match.
How to study the parts in order
- Start with the Form 4 guide, especially the mole concept and equations.
- Continue with the Form 5 guide.
- Read the exam guide and confirm the current format on the Lembaga Peperiksaan website.
- Build a plan from the revision guide.
- Use the glossary for terms you keep mixing up.
Who should start where
A student who cannot balance equations should begin with the Form 4 foundations. A student who balances equations but freezes on moles should practise the 1 : 1 and 1 : 2 ratio examples first. A student with limited time should go to the revision page.
If you want a teacher to watch the working as it happens, see online one-to-one SPM Chemistry tuition and choosing a useful lesson focus.