Chemistry 9701/03 May June 2005 | Cambridge AS Level Past Papers With Mark Scheme

1. Titration of Ethanedioic Acid: Using potassium manganate(VII) to titrate ethanedioic acid to determine its concentration in FA 1, and subsequently calculating the mass of water in hydrated ethanedioic acid (H2C2O4.xH2O).
2. Qualitative Analysis of Unknown Solution: Performing tests to identify cations and anions in FA 3, using reactions with sodium hydroxide, ammonia, potassium chromate(VI), and silver nitrate, to confirm the presence of specific ions.
3. Reaction and Product Identification: Applying qualitative analysis techniques to identify gases like ammonia, carbon dioxide, chlorine, hydrogen, oxygen, and sulfur dioxide based on their reactions and testing methods.
4. Chemical Calculations: Calculating the number of moles of potassium manganate(VII) used in titration, the concentration of ethanedioic acid in solution, and the hydration number in the hydrated form of ethanedioic acid.
5. General Chemistry: Investigating the reactions of ions in solution, and understanding how to apply stoichiometric calculations to determine concentration, mass, and the amount of water in hydrated salts.