🧪 IGCSE Chemistry Formula Sheet 2026
Complete Cambridge IGCSE Chemistry (0620) Formula Reference Guide
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Aligned with the latest 2026 syllabus and board specifications. This sheet is prepared to match your exam board’s official specifications for the 2026 exam series.
Essential IGCSE Chemistry Formulas & Concepts
Master your IGCSE Chemistry exams with our comprehensive formula sheet covering all essential formulas, concepts, and calculations for Cambridge IGCSE Chemistry (0620). This reference guide includes atomic structure, stoichiometry, energetics, rates of reaction, equilibrium, redox reactions, electrolysis, acids & bases, organic chemistry, and more.
CIE IGCSE Chemistry (0620) – Extended Syllabus Formula Sheet
Complete Reference Guide for 2026 Syllabus
1. Atomic Structure & Stoichiometry
Ar = (average mass of 1 atom) / (1/12 mass of C-12 atom) Mr = Σ Ar n = mass / Mr mass = n × Mr N = n × Nₐ n = V / 24 C = n / V (mass of element / mass of compound) × 100 Simplest whole-number ratio of atoms 2. Chemical Calculations
Sum of relative atomic masses (Ar) n = mass / Mr mass = n × Mr no. of particles = n × 6.02 × 10²³ n = volume of gas / 24 concentration = moles / volume (mass of element in compound / total mass of compound) × 100 Simplest whole number ratio of atoms 2. Energetics
Q = mcΔT ΔH = Q/n Energy released (ΔH negative) Energy absorbed (ΔH positive) 3. Rates of Reaction
Rate = (change in concentration or mass) / time Concentration, surface area, temperature, catalyst Rate ∝ number of effective collisions 4. Equilibrium & Le Chatelier
Rate forward = Rate backward System opposes change in concentration, pressure, temperature 5. Gases & Gas Laws
PV = nRT n = V / 24 6. Acids, Bases & Salts
pH = -log[H⁺] Acid + Base → Salt + Water n = C × V 7. Electrolysis
Q = I × t n = Q / (F × z) 8. Redox & Reactivity
K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu Metal oxide + C → Metal + CO 9. Organic Chemistry
CₙH₂ₙ₊₂ CₙH₂ₙ CₙH₂ₙ₊₁OH Hydrocarbon + O₂ → CO₂ + H₂O Long-chain → shorter-chain + alkene 10. Units & Constants
Nₐ = 6.02 × 10²³ mol⁻¹ 24 dm³/mol c = 4.2 J/g°C F = 96500 C/mol 1 dm³ = 1000 cm³ 📚 How to Use This Chemistry Formula Sheet
Understand the Concepts
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Practice Calculations
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Connect Theory to Practice
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Show Your Working
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Formula sheet FAQ
Quick answers about this free PDF, how to use it for exam revision, and how it relates to your official syllabus.
Is the IGCSE Chemistry Formula Sheet 2026 free to download as a PDF?
Yes. This Tutopiya formula sheet is free to use and you can download it as a PDF from this page for offline revision. There is no payment or account required for the PDF download.
What Chemistry topics and equations does this formula sheet cover?
This page groups key Chemistry formulas in one place for revision. Complete IGCSE Chemistry formula sheet 2026 for Cambridge IGCSE Chemistry (0620). Essential formulas for atomic structure, stoichiometry, energetics, rates of reaction, equilibrium, redox, electrolysis, acids & bases,… Always cross-check with your official syllabus and past papers for your exam session.
Can I use this instead of the official exam formula booklet in the exam?
No. In the exam you must follow only what your exam board allows in the hall—usually the official formula booklet or data sheet where provided. This page is a revision and teaching aid, not a replacement for board-issued materials.
Who is this formula sheet for (Secondary)?
It is written for students preparing for assessments at Secondary in Chemistry, including classroom revision, homework support, and independent study. Teachers and tutors can also share it as a quick reference.
How should I revise with this formula sheet?
Work through past paper questions, quote the correct formula before substituting values, and check units and notation every time. Pair this sheet with timed practice and mark schemes so you see how examiners expect working to be set out.
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