Chemistry 9701/33 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Enthalpy change for HCl and NaOH reaction, temperature vs. volume plots, precision in calorimetry experiments.
2. Titration of M₂CO₃ with HCl, dilution methods, molarity calculations, relative atomic mass determination for M, procedural accuracy comparison.
3. Identification of ions in a mixture through qualitative analysis, specific tests for cations and anions, solubility and gas evolution.
4. Use of aluminum foil with sodium hydroxide to test for nitrates and nitrites, barium chloride test for sulfates and sulfites, reaction types in qualitative analysis.
5. Ion identification from observations, distinction between sulfites, nitrates, nitrites, and sulfates through sequential tests.