Chemistry 9701/43 Oct Nov 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Redox Reactions and Mechanisms: Identifying the redox nature of reactions, such as the formation of nitrosyl bromide (NOBr) from NO and Br2, using oxidation numbers to explain electron transfer.
2. Rate of Reaction: Using experimental data to deduce reaction order with respect to reactants, calculate the rate constant, and explain how changes in temperature affect reaction rates.
3. Solubility Product and Group 2 Elements: Analyzing trends in the solubility of Group 2 carbonates and performing calculations related to solubility products.
4. Electrochemical Cells and Standard Electrode Potentials: Understanding the experimental setup for measuring standard electrode potentials, calculating cell potential changes, and interpreting the effects of ion concentration on electrode potentials.
5. Catalysis and Transition Metal Complexes: Exploring the roles of transition metals in catalysis, including identifying types of catalysis (heterogeneous vs. homogeneous) and explaining their mechanisms, with focus on complexes like [Fe(ed)2Cl2]3–.
6. Organic Reactions: Identifying functional groups in organic compounds, understanding their polymerization, and studying reaction mechanisms such as electrophilic substitution in the synthesis of derivatives like 4-nitromethylbenzene.