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Chemistry WCH13/01 January 2023 | Edexcel International AS Level Past Papers With Mark Scheme
1. Identification of functional group in organic liquid P (C6H12) through bromine water test.
2. Identification of ions in inorganic solid Q (Group 1 halide) producing lilac flame and yellow precipitate with silver nitrate.
3. Ionic equation for the reaction of Q with bromine water and expected observations when mixed with P.
4. Importance of draught shield in calorimetry for accurate enthalpy change measurement of ethanol combustion.
5. Calculation of enthalpy change of combustion for ethanol, considering mass of ethanol burned and temperature change.
6. Effects of delay in extinguishing flame on enthalpy change calculation in the experiment.
2. Identification of ions in inorganic solid Q (Group 1 halide) producing lilac flame and yellow precipitate with silver nitrate.
3. Ionic equation for the reaction of Q with bromine water and expected observations when mixed with P.
4. Importance of draught shield in calorimetry for accurate enthalpy change measurement of ethanol combustion.
5. Calculation of enthalpy change of combustion for ethanol, considering mass of ethanol burned and temperature change.
6. Effects of delay in extinguishing flame on enthalpy change calculation in the experiment.