Chemistry 9701/31 Oct Nov 2022 | Cambridge AS Level Past Papers With Mark Scheme

1. Determining the concentration of a dilute hydrochloric acid solution by titration with potassium carbonate and calculating the concentration of ethanedioate ions.
2. Performing a series of titrations with manganate(VII) ions to find the amount of ethanedioate ions in the solution and calculating the relative formula mass of the ethanedioate salt.
3. Calculating the enthalpy change for the dehydration of hydrated sodium carbonate using Hess's Law.
4. Analyzing experimental results for the enthalpy of solution of hydrated and anhydrous copper(II) sulfate.
5. Identifying cations and anions in various samples using qualitative analysis methods such as heating, adding reagents, and recording observations.
6. Suggesting improvements to experimental methods to ensure more accurate results, including modifying the experimental setup and understanding the effects of temperature and concentration.