Chemistry 9701/33 Oct Nov 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Reaction rate analysis of sodium thiosulfate and hydrochloric acid, using visual endpoints and time measurements to determine the effect of concentration on rate.
2. Graphical representation of reaction rates against sodium thiosulfate volumes, including line of best fit and proportionality assessment.
3. Quantitative calculations for initial concentration of sodium thiosulfate and its impact on the reaction rate.
4. Identification of cations and anions in qualitative analysis, involving precipitation reactions with sodium hydroxide, ammonia, and silver nitrate.
5. Evaluation of halide ions in solutions using solubility and color tests with silver nitrate and ammonia.
6. Experimental design suggestions for altering acid concentration in reaction rate studies, ensuring consistent methodology for comparative analysis.