Chemistry 9701/12 May June 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Rate of effusion in gases, molecular mass effect on effusion speed, experimental design for gas comparison.
2. Titration methods for analyzing iron(III) concentration, calculating reaction rates from effusion time, determining the purity of calcium carbonate.
3. Organic chemistry reactions, halogenation, and esterification, analysis of compound interactions, including Tollens' reagent and Fehling's test.
4. Photochemical reactions, optical isomerism, and mechanisms in halogenation, product identification, and reagents used for detection.
5. Gas laws, molecular behavior in reactions, understanding stoichiometry and bond changes, with emphasis on the Haber process and related equilibrium dynamics.