OCR A Year 13 Chemistry

Choose the Year 13 topic you are studying. Module 5 physical and inorganic chemistry is separated from the Year 12 material that returns synoptically.

Transition metals & inorganic chemistry Year 13 organic chemistry

What are you working on?

For rates, equilibria and energetics, write the equation or expression before substituting values.

Kinetics & rates

OCR 5.1.1

KineticsStart here · Boltzmann, rate evidence and Arrhenius Open Kinetics exam setsLinked original mini-papers across the topic Open Rate equation questionsOrders, rate constants and units Open Rate Order DetectiveOrders from experimental evidence and OCR half-life clues Open Arrhenius equation & plotsEa, ln k against 1/T and graphical A Open Rates & equilibrium quick checkCore recall Open

Equilibrium

OCR 5.1.2

EquilibriumStart here · Kc, Kp, partial pressure and equilibrium response Open Kc & Kp calculationsLinked equilibrium calculations with OCR-specific interpretation practice Open Kc & Qc simulatorExpressions and equilibrium response Open

Acids, bases & buffers

OCR 5.1.3

Acid–base calculationspH, Ka, Kw and buffers Open Buffer & indicator reasoningSpecies inventory, buffer action and pH-curve decisions Open Acids & buffers quick checkpH, Ka and buffer recall Open Acids & buffers topic routeFocused Year 13 practice Open

Thermodynamics

OCR 5.2.1 · 5.2.2

ThermodynamicsStart here · lattice energetics, entropy, Gibbs and feasibility Open Entropy & Gibbs free energyΔS, ΔG, unit traps and feasibility Open Temperature & feasibilityCrossover, ΔG–T graphs and kinetic limitation Open Lattice, hydration & solutionSolution cycles, missing terms and ionic charge/radius trends Open Thermodynamics exam setsLinked original mini-papers across the full thermodynamics topic Open Born–Haber cyclesBuild cycles · lattice formation convention · missing terms Open

Redox & electrode potentials

OCR 5.2.3

Electrode potentialsStart here · E° reasoning, practice and precise wording Open Generated electrode-potential exam setsOriginal linked mini-papers with mark points and worked reasoning Open Electrode-potential questionsE°cell, reaction direction and overall equations Open E° ExplorerCompare redox couples and see the reaction route Open E versus E°Concentration, pressure and half-cell equilibrium Open Feasibility & advanced redoxNon-standard conditions, disproportionation and catalysis Open Electrochemical Cell LabBuild half-cells, electrodes, salt bridges and electron flow Open Standard hydrogen electrodeBuild the 0.00 V reference and learn standard conditions Open PAG8 electrochemical-cell practicePractical method, standard conditions and evaluation Open Fuel cells & rechargeable cellsCommercial cells, discharge/recharge and board-specific scope Open Commercial-cell questionsStorage, fuel-cell and recharge exam practice Open Hard electrode-potential questionsUnfamiliar data, missing E° and selective reduction Open Half-equation practiceEarlier redox equations refresher Open

Transition metals & qualitative analysis

OCR 5.3.1 · 5.3.2

Transition-metal topic routeComplex ions, colours, redox and qualitative analysis Open Transition-metal exam setsConfigurations, definitions, complexes and ligand substitution Open Complex-ion labLigands, coordination and stereochemistry Open Transition-metal coloursIons, complexes and precipitates Open

Practical chemistry

OCR Module 1 · PAGs

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

Synoptic Year 12 review

Earlier content in full A-level papers

Maxwell–Boltzmann distributionsTemperature, catalysts and exam graphs Open Hard isotope algebraAtomic-structure stretch Open Advanced ionisation energySecond and third IE challenge Open Bonding BlasterFast bonding recall Open OCR definitions matchingBoard-specific terms and definitions Open All calculationsBrowse calculation generators Open