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1. Ammonium carbonate decomposition–balanced equation, gas product identification, chemical tests for ammonia, water, carbon dioxide
2. Alcohol analysis–chemical test for hydroxyl group, oxidation to aldehyde/ketone, reagent and apparatus selection, mass spectrometry interpretation
3. Thermochemistry–temperature change vs mass, reaction enthalpy, experimental design, anomalous result identification, relative atomic mass calculation
4. Sodium hydroxide purity–standard titration method, volumetric analysis, endpoint detection, mean titre calculation, concentration and percentage purity determination
5. Alkene production–dehydration of alcohol using Al₂O₃, test tube setup, safety handling of apparatus post-heating, alkene confirmation with bromine
6. Practical chemistry skills–reagent recognition, observation recording, result interpretation, experimental justification, lab technique application

Edexcel International AS/A Level Chemistry (WCH) Jun 2019

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Classification: Unit 3

Page count: 16

Viewed: 61

Last update: 2 months ago

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Chemistry WCH13/01 May June 2019 | Edexcel International AS Level Past Papers With Mark Scheme

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