Chemistry 9701/52 Oct Nov 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Determination of the molar ratio of oxygen to lead in oxides (PbO, PbO₂, Pb₃O₄) through reduction with hydrogen gas, including graphical representation of molar relationships.
2. Experimental setup for lead oxide reduction using standard laboratory apparatus, incorporating safety precautions for handling hydrogen and lead compounds.
3. Calculation of minimum hydrogen volume required for reduction reactions, using stoichiometric principles and gas laws.
4. Hydrolysis kinetics of glucose, analyzing data for first-order reaction behavior through logarithmic plots and slope determination for rate constant calculation.
5. Graphical analysis of hydrolysis data, including identification and correction of anomalous points, reliability assessment, and visualization of temperature effects on reaction rates.
6. Comprehensive hazard assessment in experiments involving toxic lead oxides and flammable hydrogen, with recommended safety measures.