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Classification: OCR Paper 3
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Crash report
Chemistry (A) H432/03 June 2023
1. Periodic trends and structure: hydrogen bonding elements (N, O, F), ionisation energy patterns, metallic and molecular lattice types, octahedral compounds (SF₆), unpaired electrons, atomic mass calculation
2. Reaction types and energetics: enthalpy of solution (calorimetry), acid dilution effect on rate, redox and disproportionation (Au/HCl/HNO₃), equilibrium constant (Kc for SO₃ formation), bond angle prediction in nitric acid, dot-and-cross for NO₃⁻
3. Mechanisms and organic reactivity: diazonium ion hydrolysis (carbocation mechanism), nucleophilic substitution with water, reaction flowcharts (acrolein, aspirin, phenol), reflux setup, esterification and hydrolysis equations
4. Spectroscopy and structure determination: aspirin titration analysis, proton/carbocation structure in organic acids, molecular identification from elemental, IR, NMR, MS data, molar mass from gas data (chlorauric acid example)
5. Coordination and transition chemistry: Tutton’s salts (double salt formation), copper-ammonia complex, transition metal precipitation, confirmatory test for SO₄²⁻, ligand substitution, anion testing (sulfate), ammonia test gas
2. Reaction types and energetics: enthalpy of solution (calorimetry), acid dilution effect on rate, redox and disproportionation (Au/HCl/HNO₃), equilibrium constant (Kc for SO₃ formation), bond angle prediction in nitric acid, dot-and-cross for NO₃⁻
3. Mechanisms and organic reactivity: diazonium ion hydrolysis (carbocation mechanism), nucleophilic substitution with water, reaction flowcharts (acrolein, aspirin, phenol), reflux setup, esterification and hydrolysis equations
4. Spectroscopy and structure determination: aspirin titration analysis, proton/carbocation structure in organic acids, molecular identification from elemental, IR, NMR, MS data, molar mass from gas data (chlorauric acid example)
5. Coordination and transition chemistry: Tutton’s salts (double salt formation), copper-ammonia complex, transition metal precipitation, confirmatory test for SO₄²⁻, ligand substitution, anion testing (sulfate), ammonia test gas