Chemistry 9701/51 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Electrolysis and Faraday's Constant: Setting up electrolysis to determine the Faraday constant, including using copper(II) sulfate, copper electrodes, and measuring mass change.
2. Measurement of Electrolysis Charge: Calculating the charge passed through a solution, the mass of copper deposited, and the relationship between charge and mass in the electrolysis process.
3. Copper Ion and Electrolysis: Investigating the mass loss of the anode, calculating moles of copper removed, and explaining the charge required for copper ion deposition.
4. Effect of Wet Anode: Understanding the error caused by not drying the anode and its effect on the Faraday constant calculation.
5. Reaction of Benzenediazonium Ion: Measuring nitrogen gas production during the decomposition of benzenediazonium ion, calculating concentrations, and plotting reaction rates.
6. Half-life and Reaction Order: Using time-concentration data to determine the reaction's order, calculating half-lives, and explaining the behavior based on reaction kinetics.