Chemistry 9701/34 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Glucose and Potassium Manganate Reaction: Investigating the effect of temperature on the redox reaction between glucose and acidified potassium manganate, including experimental setup and reaction rate calculations.
2. Reaction Time Measurement: Recording time for the purple color of potassium manganate to disappear, calculating the rate of reaction at various temperatures, and plotting graphs for rate vs. temperature.
3. Concentration and Rate Calculation: Using experimental data to calculate glucose concentration in solution and determining the volume of acidified potassium manganate needed for complete oxidation.
4. Oxidation of Glucose: Suggesting the formula for the organic product of glucose oxidation, and analyzing its structure based on reaction conditions.
5. Improving Experimental Accuracy: Identifying ways to minimize experimental errors, including the use of accurate temperature control and timing methods.
6. Percentage Error and Results Interpretation: Calculating the maximum percentage error in the reaction time, discussing possible sources of error, and proposing improvements for increased precision in measurements.