Chemistry WCH16/01 May June 2022 | Edexcel International A Level Past Papers With Mark Scheme

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1. salt identification—color-based observation, NaOH/AgNO₃ tests, gas evolution, cation–anion confirmation
2. functional group detection—2,4-DNPH, Fehling’s, I₂/NaOH tests, derivative melting point for isomer confirmation
3. recrystallisation procedure—dissolution, hot filtration, cooling, filtration, drying for purity analysis
4. copper in brass—redox titration via iodide, thiosulfate calculation, entropy/enthalpy redox feasibility analysis
5. steam distillation—limonene extraction reason, chiral carbon identification, polarimeter use for optical isomer detection
6. limonene reaction—colour change with MnO₄⁻, oxidation product structure, mole calculation from density and volume

Edexcel International AS/A Level Chemistry (WCH) Jun 2022

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Classification: Unit 6

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Chemistry WCH16/01 May June 2022 | Edexcel International A Level Past Papers With Mark Scheme

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