Chemistry WCH15/01 May June 2022 | Edexcel International A Level Past Papers With Mark Scheme

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1. transition metal chemistry—catalysts (Fe²⁺, vanadium(V) oxide), electrode potentials, color changes in redox reactions (Cr₂O₇²⁻ to Cr³⁺)
2. fuel cell electrochemistry—half-equations, acidic vs alkaline comparison, electrode reactions, entropy and Ecell differences
3. Grignard reagent reactions—preparation in ether, nucleophilicity of carbon, alcohol formation from ketones
4. organic nitrogen chemistry—2-ethanoylaminobenzoic acid synthesis from benzene, mechanism correction, acylation and amide formation
5. spectroscopic analysis—¹³C NMR peak prediction, IR functional group identification, mass spectrum deduction, ester structural analysis
6. quantitative redox titration—Cr₂O₇²⁻ with Fe²⁺, color indicators, percentage composition, colorimetric analysis with DPC ligand, entropy explanation in complexation reactions

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

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Classification: Unit 5

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Chemistry WCH15/01 May June 2022 | Edexcel International A Level Past Papers With Mark Scheme

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