Chemistry 9701/35 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Quantitative Analysis: Determining the concentration of monoprotic acid by measuring the temperature changes during neutralization with sodium hydroxide and using data from thermometric methods.
2. Titration Technique: Using sodium carbonate to titrate the acid solution, calculating the concentration of the unknown acid, and assessing the accuracy of different methods.
3. Graph Interpretation: Plotting temperature versus volume data to determine the volume where neutralization occurs, identifying anomalous points, and extrapolating graphs.
4. Enthalpy Change Calculation: Describing how to calculate the enthalpy change of neutralization from thermometric data.
5. Error Analysis: Evaluating potential sources of error in the experimental procedures and proposing methods for minimizing these errors.
6. Dilution and Standardization: Diluting the acid solution and using it for titrations, with consistent and accurate reporting of volumes and concentrations.
7. Identifying Ions: Conducting tests to identify cations and anions in unknown solutions and recording observations from reactions with various reagents like sodium carbonate, silver nitrate, and barium chloride.
8. Gas Tests and Precipitation Reactions: Performing qualitative tests for gases and precipitation reactions, including the use of indicators and the identification of products.