Chemistry 9701/32 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Titration of Amidosulfonic Acid: Determining the value of x in amidosulfonic acid by titration with sodium hydroxide using thymolphthalein indicator and calculating the relative formula mass.
2. Barium Amidosulfonate Solubility: Conducting an experiment to test the solubility of barium amidosulfonate in water and recording observations and conclusions.
3. Decomposition of Hydrated Copper Hydroxycarbonate: Heating hydrated copper hydroxycarbonate to investigate the value of y in the formula, determining the moles of copper oxide produced, and calculating the relative formula mass.
4. Accuracy Improvement for Decomposition Experiment: Suggesting methods to improve the accuracy of the experiment while using the same mass of hydrated copper hydroxycarbonate.
5. Qualitative Analysis for Identifying Ions: Identifying ions in a sample by conducting tests with hydrochloric acid and recording observations.
6. Further Qualitative Testing of Cation and Anion Reactions: Performing tests to identify the cation and anion in an unknown sample and explaining the observations made during the reactions.