Chemistry WCH13/01 January 2022 | Edexcel International AS Level Past Papers With Mark Scheme

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Edexcel
International AS/A Level
Chemistry (WCH)

1. identification tests for NH₄⁺ and Cl⁻ ions, enthalpy change calculation for NH₄Cl dissolution, calorimetry error analysis
2. combustion analysis of organic compounds, empirical formula from combustion data, detection of –OH using PCl₅
3. reflux oxidation of alcohols, separation and identification of carboxylic acids using IR spectrum and mass spectrometry
4. precipitation titration with silver nitrate, chromate indicator use, calculation of x in BaCl₂·xH₂O from titre data
5. preparation of anhydrous AlCl₃, function of CaCl₂ as drying agent, safety protocols for handling Cl₂ gas
6. reaction observation timing, potassium hydroxide absorption role, procedural safety in gas release and collection

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

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Chemistry WCH13/01 January 2022 | Edexcel International AS Level Past Papers With Mark Scheme

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