Chemistry 9701/33 Oct Nov 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Magnesium and Copper Sulfate Reaction: Investigating the enthalpy change when magnesium reacts with copper(II) sulfate, recording temperature changes, and calculating heat energy and enthalpy change per mole.
2. Zinc and Copper Sulfate Reaction: Determining the enthalpy change for the reaction between zinc and copper(II) sulfate, calculating the heat energy, enthalpy change, and identifying the effect of using different quantities.
3. Error and Accuracy in Reaction Measurements: Analyzing the impact of experimental errors, such as thermometer readings, and suggesting ways to improve the accuracy of experiments involving heat changes.
4. Preparation of Copper Sulfate Solutions: Conducting experiments to measure enthalpy changes in reactions, adjusting the volume of reactants, and improving methodology for precise results.
5. Qualitative Analysis of Anions and Cations: Identifying unknown ions using qualitative tests with reagents, observing color changes, precipitates, and gas formation, and suggesting suitable identification methods for various ions.
6. Reaction Mechanisms in Organic Chemistry: Investigating reaction mechanisms in organic compounds like allyl chloride, analyzing free-radical substitution, and understanding stereoisomerism in the context of chemical reactions.