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.

Rates of reaction

OCR 5.1.1

KineticsStart here · rate evidence, orders, mechanisms and Arrhenius Open Rate equation & mechanism questionsOrders, rate-determining steps and mechanism evidence 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 My Chemistry questions97 multiple-choice questions Practise

Equilibrium (Kc and Kp)

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 My Chemistry questions119 multiple-choice questions Practise

Acids, bases and 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 My Chemistry questions107 multiple-choice questions Practise

Lattice enthalpy

OCR 5.2.1

Lattice enthalpy topic routeBorn–Haber cycles, lattice enthalpy and ionic energetics Open Lattice, hydration & solutionSolution cycles, missing terms and ionic charge/radius trends Open Born–Haber cyclesBuild cycles · lattice formation convention · missing terms Open Thermodynamics exam setsOriginal questions including lattice-enthalpy calculations and reasoning Open My Chemistry questions66 multiple-choice questions Practise

Enthalpy and entropy

OCR 5.2.2

Entropy & Gibbs free energyΔS, ΔG, unit traps and feasibility Open Temperature & feasibilityCrossover, ΔG–T graphs and kinetic limitation Open Thermodynamics topic routeEntropy, Gibbs energy and feasibility Open Thermodynamics exam setsOriginal entropy, Gibbs and feasibility questions Open My Chemistry questions63 multiple-choice questions Practise

Redox and 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 My Chemistry questions83 multiple-choice questions Practise

Transition elements

OCR 5.3.1

Rotate complex-ion modelsPeriodic table explorer · full A level Open explorer Transition-element topic routeComplex ions, colours, redox and catalysis 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 My Chemistry questions124 multiple-choice questions Practise

Qualitative analysis

OCR 5.3.2

Qualitative-analysis questionsPlan tests, identify cations and interpret transition-metal observations Open Revise qualitative analysisCation tests, precipitates, ligand reactions and unknown ions Open Transition metals & inorganic chemistryColours, complexes and related qualitative chemistry Open My Chemistry questions36 multiple-choice questions Practise

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