Chemistry 9701/53 Oct Nov 2010 | Cambridge AS Level Past Papers With Mark Scheme

1. Rate of Decomposition of Hydrogen Peroxide: Investigating how the rate of decomposition depends on hydrogen peroxide concentration, using manganese(IV) oxide as a catalyst. The rate is hypothesized to increase with concentration.
2. Apparatus for Measuring Oxygen Volume: Using standard laboratory equipment like burettes, conical flasks, and a gas collection system, ensuring no oxygen escapes during measurements.
3. Experiment Design: Detailed steps on preparing hydrogen peroxide solutions, conducting titrations with potassium iodide, and using manganese(IV) oxide for catalysis.
4. Calculating Rate of Reaction: Employing titration data to determine the rate of reaction by measuring the time for fixed volumes of oxygen to be collected.
5. Graphical Representation: Using a graph to plot concentration versus rate of reaction, identifying the relationship between these variables.
6. Error Analysis: Acknowledging potential errors in titration readings and suggesting procedural improvements for accuracy.