Chemistry 9701/53 May June 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Heat Pack Experiment: Setting up an experiment to measure the enthalpy change when anhydrous calcium chloride dissolves in water, explaining experimental observations, extrapolating temperature data, and calculating the mass of calcium chloride required for a given temperature rise.
2. Preparation of Standard Solutions: Calculating the mass of sucrose needed for a standard solution, preparing the solution accurately, and determining the volume of solutions needed to dilute the standard solution to specific concentrations.
3. Polarimeter and Concentration: Using a polarimeter to determine the specific rotation of sucrose, interpreting the observed angle of rotation, and calculating the concentration of an unknown sucrose solution based on this data.
4. Apparatus and Apparent Errors: Suggesting suitable apparatus for measuring solution volumes and explaining potential errors in the preparation of sucrose solutions that lead to anomalous results.
5. Sucrose Solution Preparation: Discussing the procedure for ensuring accurate concentration when using a 10 cm or 20 cm glass cell for sucrose solution measurements, and understanding the effect of changing the length of the cell on the observed angle of rotation.