Chemistry 9701/02 May June 2009 | Cambridge AS Level Past Papers With Mark Scheme

1. Reaction of Aluminium with Chlorine: Procedure for preparing aluminium chloride from aluminium powder, observations during the reaction, and bonding in aluminium chloride (Al₂Cl₆).
2. Copper and Titanium Reactions with Chlorine: Explanation of the formation of copper chloride (CuCl₂) and titanium chloride with excess chlorine, including mole calculations and empirical formula determination for titanium chloride.
3. Magnesium and Reactions: Calculations for the ionization energies of magnesium, observations for magnesium chloride and magnesium oxide when shaken with water, and their effects on pH.
4. Phosphorus Compounds: Reactions of phosphorus(V) chloride and phosphorus(V) oxide with water, including observations and pH changes, and the redox process when phosphorus reacts with water.
5. Methanol Combustion and Pollutants: Balanced equations for methanol combustion and pollutants produced in internal combustion engines, along with conditions to optimize methanol synthesis based on Le Chatelier's principle.
6. Methanol Synthesis: Conditions for high yield methanol production from synthesis gas, calculations for equilibrium reactions involving CO₂, H₂, CO, and H₂O, and implications for environmental benefits.
7. Organic Chemistry: Reactions involving ethanal, including steps for forming products through reduction and reaction with various reagents, with focus on functional groups and isomerism.
8. Propanone and MIBK: Conversion of propanone into MIBK, reaction pathways, reagents, and solvent identification for reducing functional groups, along with structural isomer identification.