Chemistry WCH15/01 June 2021 | Edexcel International A Level Past Papers With Mark Scheme

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1. transition metal chemistry—oxidation state prediction, ligand classification (monodentate, bidentate), coordination number determination, color origin in complexes
2. manganese redox reactions—disproportionation of MnO₄²⁻, EOcell calculation, Born–Haber-like cycle for Mn compound stability assessment
3. redox titration—Fe–MnO₄⁻ reaction, percentage Fe calculation in steel wire, volumetric analysis, procedural error impact (use of distilled water)
4. organic identification—functional group tests, gas displacement for molar mass, reaction with ethanoyl chloride, empirical formula from elemental analysis, structural deduction via ¹H NMR
5. benzene chemistry—combustion enthalpy comparison with cyclohexenes, resonance stabilization, electrophilic substitution vs addition with bromine, phenol reactivity comparison
6. iron complex chemistry—ligand exchange with thioglycolic acid, colorimetric detection, coordination variation in chloro complexes, catalysis in redox and colorimetric reactions, homogeneous vs heterogeneous catalysis, ligand type inference (thioglycolic acid), ppm iron detection in sodium carbonate using calibration graph

Edexcel International AS/A Level Chemistry (WCH) Jun 2021

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Classification: Unit 5

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Chemistry WCH15/01 June 2021 | Edexcel International A Level Past Papers With Mark Scheme

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