Chemistry 9701/13 Oct Nov 2020 | Cambridge AS Level Past Papers With Mark Scheme

1. Understanding Chemical Reactions: Interpretation of the reaction order with respect to hydrogen, iodine, and the corresponding rate laws, using experimental data to calculate rate constants and the influence of concentration changes on reaction rates.
2. Bond Energy and Reaction Mechanisms: Analysis of bond energies in reactions, such as the reaction between bromine and fluorine, including calculating the average bond energy and using reaction cycles to determine enthalpy changes.
3. Concepts in Acid-Base Chemistry: Writing expressions for equilibrium constants (Ka) and performing calculations to determine the strength of acids (e.g., HONH3+), as well as examining solubility products and their applications in determining solubility.
4. Electrochemistry: Calculations involving electrochemical cells, including determining cell potentials and understanding the effects of changing conditions on equilibrium reactions.
5. Transition Metals and Complex Formation: Studying the properties of transition metals and their complex ions, explaining the geometry and bond types of various complex ions, and predicting the behavior of these complexes in different reactions.
6. Organic Chemistry Reactions and Mechanisms: Exploring organic reactions such as halogenation, the formation of phenylamine, and synthesis pathways for various organic compounds, including mechanisms, reagents, and observed product outcomes.
7. Polymer Chemistry: Synthesis of polyamides from diamines, including identifying reagents, structures, and functional groups involved in the polymerization process.
8. Infrared and Proton NMR Spectroscopy: Interpretation of spectra to deduce molecular structures, identifying functional groups, and understanding how different solvents and sample types affect the resulting spectra.
9. Qualitative Analysis of Anions and Cations: Performing qualitative tests to identify ions based on reactions with various reagents and writing corresponding ionic equations for precipitate formation.