Chemistry 9701/43 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Standard electrode potential (SEP) concepts, equilibrium calculations, and Kc determination for Fe³⁺/I⁻ redox reactions.
2. Reaction kinetics for acid-catalyzed hydrolysis of esters, including graphical analysis, reaction order, and rate constant derivation.
3. Classification of transition metal reactions: acid-base, ligand exchange, precipitation, and redox, with examples like [Cu(H₂O)₆]²⁺/NH₃ interactions.
4. Aluminium percentage determination in alloys through hydrogen evolution from NaOH reactions.
5. Basicity comparison for ethylamine, phenylamine, and ammonia, with structural and electronic considerations.
6. Multi-step synthesis of pharmaceuticals involving intermediate characterization and reaction type identification.
7. Polymer properties in diapers, gels, and environmental applications, including polymerization types, heavy metal interactions, and cross-linking.
8. DNA fingerprinting techniques, chromatography applications, and analysis of DNA/protein structural stability through bonding mechanisms.