A-Level Chemistry Complete Guide
Everything you need to know about Cambridge (9701), Edexcel (9CH0) and OCR A-Level Chemistry — syllabus, topics, assessment structure, AS vs A2 differences, and exam preparation.
What is A-Level Chemistry?
A-Level Chemistry is a two-year qualification (typically ages 16–19) that forms the foundation for university degrees in medicine, pharmacy, chemical engineering, biochemistry, and materials science. The course is split into AS Level (Year 1) and A2 Level (Year 2). Together they make a full A-Level.
Which A-Level Chemistry board are you taking?
Cambridge 9701
Most common internationally. Papers: 1 (MCQ), 2 (AS structured), 3 (Practical), 4 (A2 structured), 5 (Planning). Known for precise mark scheme language and calculation focus.
Full Cambridge syllabus →Pearson Edexcel 9CH0
Unit-based system (6 units total). Includes core practicals, extended writing questions, and specific calculation methodologies. Popular in international schools.
Edexcel 9CH0 syllabus →OCR A & B (Salters)
OCR A (traditional) and OCR B (context-led). Practical endorsement (PAGs) required. Examined with multiple choice, longer answer, and synoptic questions.
A-Level exam guide →AS Level vs A2 Level — what changes?
Foundations
Atomic structure, bonding, energetics, kinetics, equilibrium intro, basic organic (alkanes, alkenes, halogenoalkanes, alcohols). Shorter papers, less depth.
Advanced topics
Kp, Gibbs free energy, Nernst equation, transition metals, multi-step organic synthesis, NMR spectroscopy, aromatic chemistry. Significantly harder and deeper.
Every A-Level Chemistry topic covered
⚗️ Physical Chemistry
- Atomic structure & isotopes
- Bonding & molecular shape
- Energetics (Hess, Born-Haber)
- Kinetics & rate equations
- Equilibrium (Kc, Kp)
- Acids, bases & pH buffers
- Thermodynamics (Gibbs, entropy)
- Electrochemistry & Nernst
🧪 Organic Chemistry
- Alkanes, alkenes & alcohols
- Halogenoalkanes (SN1/SN2)
- Carbonyl compounds
- Aromatic chemistry (benzene)
- Nitrogen compounds (amines, amides)
- Polymers & condensation
- Organic synthesis routes
- Spectroscopy (NMR, IR, MS)
🔩 Inorganic Chemistry
- Periodicity (trends)
- Group 2 & Group 17
- Transition metals
- Complex ions & ligands
- Ligand substitution
- Redox & electrode potentials
- Catalysis & colour
How A-Level Chemistry is assessed
📘 Cambridge 9701
📗 Edexcel 9CH0
Why A-Level Chemistry is harder than IGCSE
📈 The jump from IGCSE to A-Level is significant — deeper concepts, advanced calculations, and precise mark scheme language. Most students find A2 especially challenging.
Read IGCSE → A-Level guideUseful A-Level Chemistry guides
📖 Cambridge 9701 Syllabus
Complete topic list with paper breakdowns
📖 Edexcel 9CH0 Syllabus
Unit structure and core practicals
📘 AS Level topics (2025–26)
Every AS topic with exam relevance
⚠️ Why A2 is much harder
Detailed comparison AS vs A2
📝 A-Level exam guide
Paper formats, timing, command words
🇹🇷 Exam registration in Turkey
Centres, deadlines, process
Common questions about A-Level Chemistry
What is the difference between AS and A2?
AS Level covers Year 1 (foundations). A2 Level covers Year 2 (advanced topics like Kp, Gibbs, transition metals, NMR). AS + A2 = full A-Level. A2 is significantly harder and counts more toward your final grade.
Which exam board is easiest?
No board is objectively easier — each has different strengths. Cambridge is calculation-heavy with precise language. Edexcel has more extended writing. OCR A has synoptic questions. Choose based on your school or exam centre availability.
Can I take A-Level Chemistry without IGCSE?
Most schools require IGCSE Chemistry (or equivalent) at grade B/6 or above. If you haven't taken IGCSE, some centres allow entry with strong science background, but the jump is very steep.
How much practical work is involved?
Cambridge has Paper 3 (practical skills) and Paper 5 (planning). Edexcel has core practicals assessed in written exams. OCR requires practical endorsement (PAGs) separately. All boards test practical understanding in theory papers.
What grade do I need for medicine?
UK medical schools typically require A/A* in A-Level Chemistry. Competitive universities (Oxford, Cambridge, Imperial) often ask for A* in Chemistry plus A in another science.