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1. Thermal decomposition identification–gaseous product analysis, glowing splint relighting, flame test for green emission, cation-anion determination from observed reactions
2. Solution mixing deduction–identification of four unknown aqueous compounds via precipitation and effervescence, correct pairing from reaction patterns
3. Organic functional group analysis–reaction with PCl₅ and NaHCO₃, displayed formula derivation, distinction by IR spectroscopy, molecular structure matching
4. Enthalpy change of neutralisation–reaction setup with HCl and NaOH, heat measurement using calorimetry, temperature recording, heat loss comparison between beaker and polystyrene cup
5. Hydrated carbonate titration–volumetric flask preparation, acid-base titration using methyl orange, titre calculation, mole ratio derivation, metal M identification via molar mass calculation, crystal formation method without indicator

Edexcel International AS/A Level Chemistry (WCH) Oct 2020 Chemistry (WCH) directory

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Chemistry WCH13/01 October 2020 | Edexcel International AS Level Past Papers With Mark Scheme

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