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Eduqas A-Level Chemistry: complete guide to the content and the exams

A complete guide to WJEC Eduqas A-Level Chemistry (England). Covers the three content sections (Core Ideas, Principles and Concepts; Physical and Inorganic Chemistry; Organic Chemistry and Analysis), the three written components, how the AS year maps onto the A-level, the practical work, the maths demand, and how to study each topic for top grades.

Browse guides →Syllabus dot points (32)

WJEC Eduqas A-Level Chemistry (England) is a two-year linear course assessed by three written components at the end of Year 13. There is no coursework grade; practical work is assessed inside the written papers and reported separately as a practical endorsement. This page is the index: below is a map of the content, the exam structure, and how to study each topic.

The Eduqas Chemistry content sections

The specification groups its content into three sections. The first, Core Ideas, Principles and Concepts, is the AS material taught in the first year. The other two extend it at A2 level.

Core Ideas, Principles and Concepts (the AS year)
Three topics: C1 The Language of Chemistry and Structure of Matter (formulae and equations, atoms, calculations, bonding, solid structures and the periodic table); C2 Chemical Change (simple equilibria and acids and bases, thermochemistry, rates and the wider impact of chemistry); and C3 Chemistry of Carbon Compounds (organic compounds, hydrocarbons, halogenoalkanes, alcohols and carboxylic acids, and instrumental analysis). This is the toolkit for everything else.
Physical and Inorganic Chemistry (A2)
Electrochemistry and standard electrode potentials, redox reactions, the chemistry of the p-block, the chemistry of the d-block transition metals, chemical kinetics (rate equations and mechanisms), energy changes (Born-Haber cycles, entropy and free energy), and equilibria (KcK_c, KpK_p, pH, KaK_a and buffers).
Organic Chemistry and Analysis (A2)
Stereoisomerism, aromaticity, alcohols and phenols, aldehydes and ketones, carboxylic acids and their derivatives, amines, amino acids, peptides and proteins, and organic synthesis and analysis (chromatography and NMR spectroscopy).

We treat this as six study blocks: the three AS Core Ideas topics, then physical chemistry, inorganic chemistry, and organic chemistry and analysis.

Exam structure

Eduqas A-Level Chemistry is assessed by three written components, all sat at the end of the course. A scientific calculator and the Eduqas data booklet are provided in every paper.

  • Component 1 - Physical and Inorganic Chemistry. 2 hours 30 minutes, 120 marks, 40 per cent. Section A is 15 marks of short answers; Section B is 105 marks of structured and extended questions. Draws on the Core Ideas and the Physical and Inorganic Chemistry content.
  • Component 2 - Organic Chemistry and Analysis. 2 hours 30 minutes, 120 marks, 40 per cent. Same Section A and Section B split. Draws on the Core Ideas and the Organic Chemistry and Analysis content.
  • Component 3 - Chemistry in Practice. 1 hour 15 minutes, 60 marks, 20 per cent. Questions are based on the whole specification with a strong practical and data-handling emphasis.

Each paper includes short-answer, structured and extended-response questions. At least 20 per cent of marks assess maths skills, and the specified practical work is tested across all three papers, especially Component 3.

How to study Eduqas Chemistry

Chemistry rewards quantitative fluency, precise recall of reactions and trends, and confident mechanism drawing.

  1. Work from the specification statements. Each statement is a checklist; questions are written from them. Turn each one into a flashcard.
  2. Drill the maths. With at least 20 per cent of marks mathematical, moles, titrations, Hess and Born-Haber cycles, rates, KcK_c, KpK_p, pH and electrode potentials must be automatic.
  3. Master mechanisms and pathways. Organic marks reward correct curly arrows, conditions and reagents; build a reaction map linking functional groups across C3 and the Organic Chemistry and Analysis section.
  4. Learn the specified practical work. Titrations, enthalpy measurements, rates experiments, qualitative inorganic and organic tests, and organic preparation and purification recur across all three papers, especially Component 3.
  5. Practise synoptic, practical-style questions. Component 3 connects the whole course and favours unfamiliar contexts and data, so drill past papers from the start of Year 13.

Work through the topics

Each study block has an overview guide and a set of dot-point answer pages with worked exam questions and cross-links: the language of chemistry and structure of matter; chemical change; the chemistry of carbon compounds; physical chemistry; inorganic chemistry; and organic chemistry and analysis.

For the official specification

Eduqas publishes the full specification, past papers, mark schemes and the data booklet at eduqas.co.uk. Always revise from the current specification and Eduqas's own past papers, because question style and the practical-focused Component 3 format are board-specific.

Chemistry guides

In-depth written guides with paired practice quizzes.

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Chemistry practice quizzes

Multiple-choice drills with worked answer explanations. Your scores stay on this device.

The A-LEVEL-EDUQAS system, explained

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Common questions about Chemistry

How is Eduqas A-Level Chemistry structured?
Eduqas A-Level Chemistry is a two-year linear course assessed entirely by three written exams at the end of Year 13. The subject content is grouped into three sections: Core Ideas, Principles and Concepts (the AS material, taught first); Physical and Inorganic Chemistry; and Organic Chemistry and Analysis. There is no coursework grade, but practical skills are assessed within the written papers, especially the practical-focused Component 3, and a separate practical endorsement (Practical Skills Statement) is reported alongside your grade.
What are the three Eduqas A-Level Chemistry components?
Component 1 (Physical and Inorganic Chemistry) is 2 hours 30 minutes, 120 marks and worth 40 per cent, with a 15-mark short-answer Section A and a 105-mark structured and extended Section B. Component 2 (Organic Chemistry and Analysis) has the same format and weighting. Component 3 (Chemistry in Practice) is 1 hour 15 minutes, 60 marks and worth 20 per cent, drawing on the whole specification with a strong practical and data-handling emphasis.
What maths skills does Eduqas A-Level Chemistry require?
At least 20 per cent of the marks assess mathematical skills at Level 2 (GCSE higher tier and above). Expect moles, concentration and titration calculations, empirical and molecular formulae, the ideal gas equation, percentage yield and atom economy, Hess cycles and Born-Haber cycles, entropy and Gibbs free energy, rate equations and orders, the equilibrium constants $K_c$ and $K_p$, pH, $K_a$ and buffers, and standard electrode potentials. A scientific calculator and the Eduqas data booklet are provided in every paper.
How does the Eduqas AS map onto the A-level?
The AS Chemistry content is exactly the Core Ideas, Principles and Concepts section of the A-level. AS Unit 1 (The Language of Chemistry, Structure of Matter and Simple Reactions) covers atomic structure, bonding, calculations and an introduction to inorganic and organic reactions; AS Unit 2 (Energy, Rate and Chemistry of Carbon Compounds) covers thermochemistry, rates, the wider impact of chemistry and the carbon-compound chemistry. At full A-level these AS topics are reassessed inside Components 1, 2 and 3 alongside the A2 Physical and Inorganic and Organic and Analysis material.
How should I structure my Eduqas A-Level Chemistry revision?
Work topic by topic against the specification statements, because questions are written directly from them. Master the chemical-calculations toolkit first because it underpins almost every quantitative question, then build atomic structure, bonding and energetics, then the physical-chemistry calculations (kinetics, equilibria, pH, thermodynamics, electrode potentials), and weave the organic reaction map and mechanisms throughout. Drill the maths until it is automatic and practise the synoptic, practical-style Component 3 from the start of Year 13.
How does Eduqas A-Level Chemistry compare to other exam boards?
All A-Level Chemistry specifications (Eduqas, AQA, OCR, Edexcel) cover the same core regulated content, so bonding, equilibria, energetics and organic mechanisms are broadly the same everywhere. Eduqas is the England-facing brand of WJEC and shares almost all of its content with the WJEC specification. Its distinctive features are the three-section content structure, the two large 120-mark theory components plus the practical-focused Component 3 (Chemistry in Practice), and its own data booklet. Always revise from the current Eduqas specification and Eduqas past papers, because question style is board-specific.
What's the difference between ionic and covalent bonding?
Ionic: electrons are transferred between atoms (typically metal + non-metal); forms a lattice. Covalent: electrons are shared (non-metal + non-metal); forms discrete molecules or networks.
How do I calculate pH?
pH = -log₁₀[H⁺]. For strong acids/bases, [H⁺] equals the concentration. For weak acids, use Ka. For buffers, use Henderson-Hasselbalch.
What's Le Chatelier's principle?
When a system at equilibrium is disturbed (concentration, temperature, pressure change), the equilibrium shifts to partially counteract the disturbance.
How do I balance a redox equation?
Identify the half-reactions (oxidation and reduction), balance atoms (excluding O and H), balance O with H₂O and H with H⁺, balance charge with electrons, then combine so electrons cancel.
What's the difference between enthalpy and entropy?
Enthalpy (ΔH) is the heat change of a reaction. Entropy (ΔS) is the change in disorder. Gibbs free energy (ΔG = ΔH - TΔS) tells you if the reaction is spontaneous.