Edexcel IGCSE Chemistry Exam Technique Cheat Sheet 2026 (4CH1)
Every Edexcel IGCSE Chemistry command word decoded — what examiners actually want, the structure that earns full marks, the top mistakes flagged in real examiner reports, and the phrases that pick up the marks others leave on the table. Free printable PDF.
5 command words decoded
5 top mistakes flagged
Phrases that earn marks
Print-ready PDF
Command words — click to expand
Top tips for Chemistry
- 1Always name particles specifically (Na⁺, Cl⁻, e⁻, OH⁻).
- 2Balance every equation; include state symbols (s), (l), (g), (aq).
- 3Mol calculations: write formula first, convert units, answer to 3 s.f.
- 4Required practicals: know method, observations, source of error.
- 5For electrolysis: state half-equations at each electrode.
⚠️ Top mistakes examiners flag for Chemistry
- ✗Writing 'particles' instead of named ions.
- ✗Forgetting state symbols.
- ✗Saying covalent bonds break on melting (only intermolecular forces break).
- ✗Confusing exothermic (ΔH negative) and endothermic.
- ✗Omitting units (mol/dm³, kJ/mol).
✅ Phrases that earn marks
- → …the ions are free to move and carry charge
- → …activation energy is exceeded
- → …by Le Chatelier's principle, equilibrium shifts to oppose the change
- → …oxidation is the loss of electrons (OIL RIG)
- → …using n = m / Mr
❌ Phrases that lose marks
- ✗ Particles move (use ions / electrons)
- ✗ Reaction speeds up (use 'rate of reaction increases')
- ✗ Covalent bonds break on melting
- ✗ Forgetting units
Extended answers are where the marks live in Chemistry
Edexcel IGCSE Chemistry 6-mark and extended-response questions are won or lost on STRUCTURE and command-word interpretation. A Tutopiya Chemistry specialist marks your mock answers like an examiner and shows you exactly which command words you're misreading. Submit a free enquiry to get matched.
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Edexcel IGCSE Chemistry exam technique — FAQ
What are the most important command words in Edexcel IGCSE Chemistry? ▼
Edexcel IGCSE Chemistry (4CH1) papers use 5 core command words. The most frequently misread are Name / State (where students add unnecessary explanation) and Explain (where students describe instead of reasoning with because/therefore). The full breakdown — what each word means, the answer structure, and the do/don't list — is in the interactive cheat sheet above.
What's the difference between "describe" and "explain" in Edexcel IGCSE Chemistry? ▼
Describe asks WHAT happens — quote values from data, state the trend, no reasoning. Explain asks WHY — every sentence must contain "because", "therefore" or "as a result". Mixing them up is one of the highest-frequency reasons Edexcel IGCSE Chemistry students lose marks they could have earned with the same content.
What are the top examiner-flagged mistakes for Edexcel IGCSE Chemistry? ▼
Across recent Edexcel IGCSE Chemistry examiner reports, the most-flagged mistakes are: Writing 'particles' instead of named ions.; Forgetting state symbols.; Saying covalent bonds break on melting. The full list with explanations is in the "Top mistakes" block in the cheat sheet above.
Can I print the Edexcel IGCSE Chemistry exam technique cheat sheet as a PDF? ▼
Yes — click the "Download Chemistry Cheat Sheet PDF" button above. Sign up free (no payment), and the printable A4 PDF downloads instantly. The PDF includes the command-word table, top tips, common mistakes and the earn/avoid phrase pairs — designed to fit on one page so you can pin it above your desk.
Will this cheat sheet help me get a top grade in Edexcel IGCSE Chemistry? ▼
The cheat sheet covers EXAM TECHNIQUE — how to read command words, structure answers, and use mark-scheme language. Combined with strong subject knowledge it can lift students by 1–2 grades by closing the gap on extended-response questions. Use the Edexcel IGCSE Chemistry Grade Predictor to see where you currently sit and how many marks you need for the next grade up.
Is this Edexcel IGCSE Chemistry cheat sheet free? ▼
Yes — fully free. Sign up takes 10 seconds (name + email) and unlocks the PDF download for this and every other Tutopiya study tool. We use the email to send occasional Edexcel IGCSE Chemistry revision resources and exam updates. Unsubscribe at any time.
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