OCR A Year 12 Chemistry

Choose the topic you are studying. Each section takes you straight to the relevant questions, labs or quick checks.

Year 12 organic chemistry Head Start

What are you working on?

Show formulae, equations and observations clearly across amounts, redox and practical work.

Atomic structure and isotopes

OCR 2.1.1

Isotopes & mass spectrometryRelative atomic mass, abundance and mass spectra Open Element gameAtoms, isotopes and elements Open My Chemistry questions69 multiple-choice questions Practise

Compounds, formulae and equations

OCR 2.1.2

Equation BuilderFormulae, balanced equations, state symbols and ionic equations Open OCR definitions matchingBoard-specific formulae and equation terminology Open My Chemistry questions68 multiple-choice questions Practise

Amount of substance

OCR 2.1.3

Moles & stoichiometryFormulae, reacting amounts, gases and yield Open Ideal gas equationpV = nRT · OCR uses R = 8.314 Open Titration questionsMoles, concentration and practical results Open Back titrationMulti-stage amount-of-substance problems Open Amount of substance quick checkShort recall quiz Open All calculationsBrowse the calculation generators Open My Chemistry questions168 multiple-choice questions Practise

Acids

OCR 2.1.4

Acid–base titration practiceStandard solutions, neutralisation and titration calculations Open Revise Year 12 acidsAcid–base reactions, strong and weak acids and titration technique Open OCR definitions matchingBoard-specific acid and titration terminology Open My Chemistry questions65 multiple-choice questions Practise

Redox

OCR 2.1.5

Redox equation practiceOxidation numbers, half-equations and overall redox equations Open Revise redoxOxidation states, electron transfer and redox equations Open OCR definitions matchingBoard-specific redox terminology Open My Chemistry questions34 multiple-choice questions Practise

Electron structure

OCR 2.2.1

Inspect elements and configurationsPeriodic table explorer · AS foundations Open explorer Electron configuration labBuild atoms and ions; connect shells, subshells and orbitals Open Block CountUse the OCR A periodic table to check configuration endings Open Electron configuration practiceFull configurations, block counting, unpaired electrons, repairs and exam sets Open Orbital boxesBuild arrows, recognise shapes and count occupied orbitals Open Ionisation energyFirst and successive ionisation energies Open My Chemistry questions35 multiple-choice questions Practise

Bonding and structure

OCR 2.2.2

Structure & bonding suiteStart here for the complete topic Open Bonding exam practiceOriginal questions for OCR A with mark-point feedback Open Shape LabElectron regions, lone pairs, shapes and angles Open Polarity & intermolecular forcesDipoles, London forces and hydrogen bonding Open Interactive molecular modelsArgon, HCl and water: London forces, permanent dipoles, hydrogen bonding and ice structure Open models Bond BuilderIonic, covalent, multiple and dative bonding Open Bonding quick checkShort structure and forces quiz Open Bonding BlasterFast retrieval practice Open Bonding DropStructure and properties game Open My Chemistry questions100 multiple-choice questions Practise

Periodicity

OCR 3.1.1

Compare the periodicity evidencePeriodic table explorer · AS foundations Open explorer Periodicity exam questionsPeriods 2 and 3 trends, structures, data and examiner-mode answer diagnosis Open Periodic Higher or LowerElement trends Open Ionisation energyUse electron structure to explain periodic ionisation-energy trends Open My Chemistry questions93 multiple-choice questions Practise

Group 2

OCR 3.1.2

Open the linked element investigationPeriodic table explorer · AS foundations Open explorer Group 2 exam questionsFull-A-level reactions, first + second IE reasoning, oxide alkalinity and OCR-specific base chemistry Open Chem Racer · Group 2Race the OCR A Group 2 recall gates Race My Chemistry questions31 multiple-choice questions Practise

The halogens

OCR 3.1.3

Open the linked element investigationPeriodic table explorer · AS foundations Open explorer Halogens exam questionsFull-A-level displacement, observations, ionic equations, disproportionation and OCR-specific organic-layer practice Open Chem Racer · HalogensRace OCR A displacement, tests, chlorine and water-treatment recall Race My Chemistry questions50 multiple-choice questions Practise

Qualitative analysis

OCR 3.1.4

Open the linked element investigationPeriodic table explorer · AS foundations Open explorer Qualitative-analysis questionsReagents, observations, ion tests and test sequences Open Revise qualitative analysisCarbonate, sulfate, halide and ammonium-ion tests Open My Chemistry questions26 multiple-choice questions Practise

Enthalpy changes

OCR 3.2.1

Hess's lawFormation, combustion and unfamiliar cycles Open My Chemistry questions41 multiple-choice questions Practise

Reaction rates

OCR 3.2.2

Reaction rates topic routeCollision theory, rate measurements, catalysts and Maxwell–Boltzmann distributions Open Maxwell–Boltzmann distributionsTemperature, activation energy and catalysts Open My Chemistry questions69 multiple-choice questions Practise

Chemical equilibrium

OCR 3.2.3

EquilibriumKc, dynamic equilibrium and the route on to Year 13 Kp Open Kc calculationsEquilibrium amounts, concentrations, expressions and units Open Kc & Qc simulatorExpressions and equilibrium response Open My Chemistry questions64 multiple-choice questions Practise

Practical chemistry

OCR Module 1 · PAGs

OCR A PAGsPAG1–PAG12 practical groups Open Practical skills practiceMethods, data, uncertainty and evaluation Open

More question practice

Bond enthalpiesCount bonds, estimate reaction enthalpies and find missing values. Work through the calculation before checking the answer. Open