Chemistry 9701/41 Oct Nov 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Redox Reactions: Explaining the redox nature of the reaction between NO and Br2 to form NOBr, using oxidation number changes.
2. Rate Laws and Reaction Kinetics: Understanding the order of reaction with respect to different reagents, using experimental data to deduce rate constants and predict reaction rates.
3. Solubility Trends in Group 2 Carbonates: Analyzing the trend in solubility of Group 2 carbonates, calculating solubility product (Ksp), and explaining observations when Na2CO3 is added to a saturated MgCO3 solution.
4. Thermal Decomposition of Nitrates: Understanding why magnesium nitrate decomposes at a lower temperature than barium nitrate, and writing equations for the reactions involved.
5. Electrochemical Cells and Redox: Defining standard cell potential, measuring electrode potentials, and calculating the effect of concentration on cell potential.
6. Lead-Acid Cells: Understanding the operation of lead-acid batteries, calculating mass changes during electrolysis, and explaining the difference in voltage behavior between lead-acid and fuel cells.
7. Transition Metal Properties: Analyzing the properties of transition metals, explaining the different bonding and structure in transition metal complexes, and understanding isomerism in complex ions.
8. Organic Reactions: Understanding the electrophilic substitution mechanism in the formation of 4-nitromethylbenzene and synthesizing benzocaine.
9. Amino Acid and Peptide Chemistry: Identifying functional groups in amino acids, understanding peptide bond formation, and discussing buffering behavior and optical isomerism.
10. Catalysis and Chemical Equilibria: Exploring catalytic processes, defining stability constants, and predicting the behavior of transition metal complexes in solution.