Chemistry 9701/03 Oct Nov 2006 | Cambridge AS Level Past Papers With Mark Scheme

1. Titration of iodate(V) ions with thiosulphate and hydrochloric acid to determine the concentration of hydrochloric acid (FA 1) through careful dilution, titration, and calculation of moles involved in the reaction.
2. Calculation of the molarity of potassium iodate(V) (FA 2), hydrogen ions (H+), and hydrochloric acid in the diluted FA 5 solution.
3. Qualitative analysis of solids in mixtures of soluble and insoluble components, identifying ions through reactions with sodium hydroxide, lead(II) nitrate, and silver nitrate.
4. Identification of cations and anions in mixtures based on precipitate formation, solubility tests, and characteristic color changes during tests.
5. Use of volumetric analysis and stoichiometry for determining acid concentrations and identifying the correct ions present in given samples.