Chemistry 9701/42 Oct Nov 2020 | Cambridge AS Level Past Papers With Mark Scheme

1. Analyzing the rate of reactions involving hydrogen and iodine, and calculating reaction orders and rate constants based on experimental data.
2. Investigating reaction mechanisms and equilibrium positions, including predicting the outcome of mixing reactants in various reactions.
3. Using data from the Born-Haber cycle to calculate lattice energies and understanding the impact of ion size on lattice energy.
4. Analyzing solubility trends in Group 2 sulfates and explaining how different conditions affect their solubility.
5. Studying electrochemical reactions, including half-equations, and calculating electrochemical cell potentials and rate constants.
6. Understanding transition metals and their complexes, including explaining coordination geometries, bonding, and the effects of ligands on complex stability.
7. Exploring organic reactions and mechanisms, such as the formation of phenylamine and polyamides, and comparing the basicity of different amines.
8. Calculating enthalpy changes, including those for hydration reactions, and understanding their implications in thermodynamic calculations.