Chemistry 7404 Paper 2 June 2022, AQA AS-Level Past Papers with Mark Schemes

AQA AS Level Chemistry (7404) Jun 2022

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The exam focuses on organic and physical chemistry, including reaction kinetics, isomer identification, and stoichiometry. Key topics include temperature effects on reaction rates, distinguishing functional groups using chemical tests and spectroscopy, and calculating empirical formulas. Practical applications involve volumetric gas calculations, percentage yield determination, and evaluating atom economy in reactions. Mechanistic analysis addresses nucleophilic substitution, elimination, and free radical substitution. Environmental chemistry examines ethanol production's carbon neutrality, while quantitative tasks involve bond enthalpy derivations and enthalpy changes. Analytical skills are tested through IR spectroscopy, molecular formula calculations, and equilibrium constants, integrating theoretical and experimental understanding.