Chemistry 9701/52 Oct Nov 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Verdigris Experiment: Determining copper(II) carbonate percentage using excess hydrochloric acid, preparing diluted HCl, measuring the dependent variable such as CO2 produced, and setting up the apparatus for accurate data collection.
2. Graphing and Titration: Plotting adsorption data, analyzing the effect of activated charcoal mass on dye adsorption, and determining the relationship between concentration differences and charcoal mass through logarithmic calculations.
3. Calculation and Interpretation: Calculating necessary HCl volume for reaction, determining mass percentages, and identifying possible errors in titration data.
4. Precautions and Handling: Suggesting precautions for handling corrosive and harmful chemicals and ensuring safe disposal and minimal risks in the laboratory setting.
5. Azurite Titration and Problems: Identifying issues in titration data and offering solutions to improve experimental accuracy. Calculating percentage by mass of copper in azurite.
6. Activated Charcoal Adsorption: Understanding the mechanism behind activated charcoal's adsorption of blue dye, performing experimental measurements, and interpreting results for increased adsorption with more charcoal.
7. Anomalous Data and Graph Analysis: Analyzing and explaining anomalous points in experimental data, calculating graph gradients, and using the graph to determine constants A and b for adsorption efficiency.