Chemistry 9701/32 May June 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Acid-carbonate titration to determine hydrogen carbonate ion concentration using methyl orange as an indicator and calculations based on stoichiometry.

2. Identification of cation and anion in spring water samples through qualitative tests for sulfate or sulfite ions and standard cation reactions.

3. Hydrated salt decomposition experiment to calculate water loss, determine the molar mass, and identify the metal component based on stoichiometry.

4. Identification of ethanol, ethanal, and propanone using Tollens' reagent and acidified potassium manganate(VII), distinguishing carbonyl and hydroxyl functional groups.

5. Measurement of experimental errors in mass and suggested procedural improvements to enhance accuracy in hydrated salt analysis.

6. Qualitative analysis notes for aqueous cations and anions, including solubility trends, precipitate reactions, and identification methods for carbonate, sulfate, and halide ions.