Chemistry 9701/36 Oct Nov 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Quantitative titration for Cu²⁺ determination using iodometric titration with sodium thiosulfate and starch indicator, involving calculations for CuSO₄ concentration.
2. Evaluation of procedural modifications for improving titration accuracy, including changes in starch and KI amounts and the impact of filtering precipitates.
3. Calorimetric analysis to determine the enthalpy change for the Zn-Cu²⁺ displacement reaction, including temperature monitoring, heat energy calculations, and molar enthalpy determination.
4. Error analysis in calorimetry due to thermometer limitations, with percentage error calculations and experimental design considerations.
5. Qualitative analysis of transition metal solutions (FB 5 and FB 6) using reagents such as NH₃, NaOH, BaCl₂, and ethanol, with interpretation of color changes and precipitate formation.
6. Reaction analysis for FB 6 and FB 7 interactions, with ethanol as a solvent, leading to cation and anion identification through comparative solubility and reactivity.
7. Prediction of outcomes for hypothetical reactions based on observations and chemical principles, supported by qualitative analysis reference tables for ions and gases.