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AQA A-Level Chemistry answers, written to the spec

5 topics · specification 7405 · explanations and examiner marking in AQA’s own language

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This is the full AQA A-Level Chemistry specification, code 7405, as elid holds it — 5 topics, each with the terminology AQA marks against. Every explanation and every mark elid gives you is written against this list, not a generic A-level one, because the same question answered in CAIE, Edexcel or OCR language loses marks it should have earned.

The AQA A-Level Chemistry specification, topic by topic

Physical Chemistry I

Assessed in Paper 1

Atomic structure, mass spectrometry, electron configuration, ionisation energy, moles, ideal gas equation, empirical and molecular formula, chemical equations, bonding (ionic, covalent, dative covalent, metallic, intermolecular forces, VSEPR), basic energetics (enthalpy, Hess's law, enthalpy cycles), basic kinetics (rates, activation energy, Maxwell-Boltzmann, catalysts), chemical equilibria (Kc, Le Chatelier's principle), redox (oxidation numbers, half equations).

Specification terms elid matches

Physical Chemistry II

Assessed in Paper 2

Thermodynamics (lattice energy, Born-Haber cycle, entropy, Gibbs free energy), rate equations (orders of reaction, rate constant k, Arrhenius equation, half-life, initial rates method), equilibrium constant Kp, electrode potentials (standard electrode potential, EMF calculations, electrochemical cells), acid-base equilibria (pH, Ka, Kw, pKa, buffers, titration curves).

Specification terms elid matches

Inorganic chemistry

Assessed in Paper 1

Periodicity (trends in properties of Period 3 elements and oxides), Group 2 (alkaline earth metals, reactions, uses), Group 7 (halogens, reactivity, halide tests), Transition metals (electron configuration, complex ions, shapes, isomerism, colour, catalysis), Reactions of ions in aqueous solution.

Specification terms elid matches

Organic chemistry

Assessed in Paper 2

Nomenclature, isomerism, alkanes, halogenoalkanes, alkenes, alcohols, organic analysis, optical isomerism, aldehydes and ketones, carboxylic acids and derivatives, aromatic chemistry (benzene, electrophilic substitution), amines, polymers, amino acids, proteins, DNA, organic synthesis, NMR spectroscopy (1H and 13C), chromatography.

Specification terms elid matches

Synoptic and Practical Skills

Assessed in Paper 3

Synoptic assessment of all content from Papers 1 and 2, plus all 12 Required Practicals covering titration, enthalpy measurement, rates of reaction, ion identification, distillation, reflux, TLC, colorimetry, and electrochemical cells.

Specification terms elid matches

How the papers are weighted

elid uses these weightings when it decides which topics deserve your revision time first.

PaperShare of the qualification
Paper 135%
Paper 235%
Paper 330%

Marked the way AQA marks it

Paste an answer you have written and elid marks it point by point against the AQA scheme: which marking points you hit, which you missed, and the sentence that would have earned each missing one. It is the difference between being told an answer is “good” and being told exactly where the marks went.

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