Chemistry 9701/31 May June 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Determination of the volume strength of hydrogen peroxide solution using titration with potassium manganate(VII) in the presence of sulfuric acid.
2. Rate of reaction analysis for hydrogen peroxide and iodide ions using thiosulfate-starch reaction timing to study effects of reactant concentration.
3. Calculations of moles, concentration, and volume strength of hydrogen peroxide, incorporating stoichiometric relationships and molar gas volume at room temperature.
4. Investigation of the influence of hydrogen peroxide and potassium iodide concentration on reaction rates, including proportionality and order of reaction.
5. Qualitative analysis for cations and anions in unknown salt mixtures using tests with sodium hydroxide, barium chloride, silver nitrate, and ammonia.
6. Use of iodine-thiosulfate clock reaction for reaction kinetics, error analysis in timing, and implications of reagent concentration changes on experimental accuracy.