Chemistry WCH16/01 January 2023 | Edexcel International A Level Past Papers With Mark Scheme

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1. Possible cations responsible for green color in solutions: Fe2+, Cr3+, Cu2+.
2. Formula of the green precipitate from solution A: Fe(OH)2.
3. Formula of the species responsible for dark green color in solution C: [Fe(OH)4]2−.
4. Type of reaction turning dark green solution to yellow: Oxidation.
5. Ion responsible for final orange color after adding ethanoic acid: Fe3+.
6. Control measure to reduce risk when using pure ethanoic acid: Use of a fume cupboard and personal protective equipment.

Edexcel International AS/A Level Chemistry (WCH) Jan 2023

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Chemistry WCH16/01 January 2023 | Edexcel International A Level Past Papers With Mark Scheme

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