Chemistry 9701/33 May June 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Determination of transition metal oxidation states via titration with acidified KMnO₄ and MSO₄, calculations of moles, and stoichiometric analysis of potential reaction equations.
2. Enthalpy change for Mg and H₂SO₄ reaction, including heat energy calculations, significance of temperature changes, and experimental error sources.
3. Qualitative analysis of transition metal solutions using potassium manganate(VII) and specific reagents to identify cations and anions based on observed color changes and precipitate formation.
4. Reactions of FA 4, FA 5, and FA 6 with KMnO₄ to deduce oxidation states and confirm presence of ions oxidized by manganate(VII).
5. Identification of chloride or sulfate ions in solutions through precipitation reactions with Ag⁺ or Ba²⁺ reagents and solubility behaviors.
6. Systematic methodology for handling heat loss, measurement accuracy, and reagent handling in quantitative and qualitative chemical experiments.