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Chemistry

A-level Chemistry, topic by topic

AQA 7405

One page per spec section: the topic distilled to a screen, the marks examiners report students losing, exam-style drills with mark schemes, and the interactive tools that train it. 16 of 33 live — the rest are on the way.

Physical chemistry

Papers 1 & 2 — the calculation and theory topics.

3.1.1

Atomic structure

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Mass spectrometry, TOF, electron configuration and ionisation energies.

3.1.2

Amount of substance

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Moles, the ideal-gas equation, empirical formulae and titrations.

3.1.3

Bonding

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Ionic, covalent and metallic bonding, shapes and intermolecular forces.

Soon
3.1.4

Energetics

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Enthalpy changes, calorimetry, Hess's law and mean bond enthalpies.

3.1.5

Kinetics

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Collision theory, Maxwell–Boltzmann, catalysts and reaction rate.

3.1.6

Chemical equilibria & Kc

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Le Chatelier, the equilibrium constant Kc and its calculations.

3.1.7

Oxidation, reduction & redox

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Oxidation states, half-equations and balancing redox reactions.

Soon
3.1.8

Thermodynamics

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Born–Haber cycles, lattice enthalpy, entropy and free energy.

Soon
3.1.9

Rate equations

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Orders of reaction, the rate-determining step and the Arrhenius equation.

Soon
3.1.10

Equilibrium constant Kp

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Partial pressures, Kp and what does (and doesn't) change it.

Soon
3.1.11

Electrode potentials & cells

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Electrochemical cells, EMF, fuel cells and feasibility.

Soon
3.1.12

Acids and bases

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

pH, Ka, buffers and titration curves for strong and weak acids.

Inorganic chemistry

Paper 1 — periodicity, the groups and transition metals.

3.2.1

Periodicity

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Trends across Period 3 — atomic radius, ionisation energy, melting point.

Soon
3.2.2

Group 2, the alkaline earth metals

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Reactions with water, solubility trends and their uses.

3.2.3

Group 7, the halogens

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Trends in oxidising/reducing power and halide-ion tests.

Soon
3.2.4

Properties of Period 3 elements & oxides

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Reactions with water, oxide acid–base behaviour and bonding.

Soon
3.2.5

Transition metals

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Complexes, colour, catalysis, variable oxidation states and shapes.

3.2.6

Reactions of ions in aqueous solution

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Aqua ions, acidity, hydroxide precipitates and ligand substitution.

Soon

Organic chemistry

Paper 2 — mechanisms, functional groups and synthesis.

3.3.2

Alkanes

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Fractional distillation, combustion, pollutants and radical substitution.

3.3.3

Halogenoalkanes

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Nucleophilic substitution, elimination and the ozone story.

3.3.4

Alkenes

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Electrophilic addition, carbocation stability and addition polymers.

3.3.5

Alcohols

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Oxidation, dehydration, esterification and the required practicals.

3.3.6

Organic analysis

Year 1
Year 1: this is the AS subject content the exam board publishes, which is what most schools teach in Year 12.

Functional-group tests, infrared and the exam-accepted observations.

Soon
3.3.7

Optical isomerism

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Chiral centres, enantiomers, racemic mixtures and optical activity.

Soon
3.3.8

Aldehydes and ketones

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Nucleophilic addition, reduction, the HCN mechanism and carbonyl tests.

3.3.9

Carboxylic acids & derivatives

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Esters, acyl chlorides, acid anhydrides and their reactions.

Soon
3.3.10

Aromatic chemistry

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Benzene bonding, electrophilic substitution — nitration and acylation.

3.3.11

Amines

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Base strength, preparation from nitriles/nitro compounds, nucleophiles.

3.3.12

Polymers

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Addition and condensation polymers, repeat units and biodegradability.

Soon
3.3.13

Amino acids, proteins & DNA

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Zwitterions, peptide bonds, protein structure and enzyme action.

Soon
3.3.14

Organic synthesis

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Planning multi-step routes and choosing reagents and conditions.

Soon
3.3.15

NMR spectroscopy

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

Carbon and proton environments, chemical shift, splitting and integration.

3.3.16

Chromatography

Year 2
Year 2: this is content the exam board adds beyond the AS subject content, for the full A-level.

TLC, column and gas chromatography and calculating Rf values.

Soon

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