Chemistry 9701/33 May June 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Percentage purity determination of calcium carbonate, titration setup for acid-base reaction, calculations for moles of reactants and products, mass of CaCO₃ determination.
2. Qualitative analysis of transition metal compounds, identification of cations and anions through precipitation and complex formation tests, interpretation of reactions with hydrogen peroxide and potassium iodide.
3. Bonding and solubility characteristics in Group IV chlorides, reactions with water, and comparison of PbCl₄, GeCl₄, and Na₂O.
4. Organic functional group identification, chemical tests for distinguishing compounds like methoxybenzene and phenol, reaction mechanisms involving halogenation.
5. Use of liposomes in drug delivery, understanding partition coefficients, functional group breakdown in acidic conditions, and PEG attachment for solubility enhancement in pharmaceuticals.