AQA and OCR A

A-level chemistry calculations

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Moles & amount of substanceStoichiometry, gases, formulae and yield Titration questionsCalculations, results and practical skills Back titrationAcid–base and redox Acid–base calculationsAQA and OCR A Year 13 Isotopes & mass spectrometryAᵣ, abundance, spectra and hard algebra TOF mass spectrometryAQA Year 12 Ideal gas equationPV = nRT

Rates

Rate equation questionsOrders, k and units Rate Order DetectiveOrders from evidence Arrhenius equationActivation energy Boltzmann questions & simulatorTemperature, catalysts and exam graphs

Equilibrium and energetics

KcExpressions and changes Hess lawYear 12 cycles and enthalpy calculations Born–Haber cyclesEnthalpy changes

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AQA or OCR A