Chemistry 9701/11 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Ideal Gas Behavior: Understanding the effects of temperature changes on the behavior of gas molecules, specifically focusing on energy distribution.
2. Mass Spectrometry: Calculating the relative atomic mass of an element based on its mass spectrum and isotope distribution.
3. Acid-Base Reactions: Performing titrations to determine the percentage of an ingredient (sodium hydrogencarbonate) in a sample using sulfuric acid, and interpreting the results.
4. Electron Configuration and Bonding: Identifying orbital energy levels and the impact of electron configuration on the properties of elements.
5. Gas Identification: Using the ideal gas law to identify the type of gas in a sample based on changes in mass and volume under specific conditions.
6. Reaction Conditions: Determining when nitrogen behaves most like an ideal gas and understanding the factors influencing real gas behavior.
7. Reaction Enthalpy: Using data to calculate the enthalpy change of a reaction, including interpreting exothermic and endothermic reactions.
8. Chemical Equilibria: Predicting the effects of pressure and temperature changes on the position of equilibrium for reversible reactions.
9. Oxidation States: Identifying oxidation states and understanding how changes in oxidation number relate to reaction products, especially in redox reactions.
10. Environmental Chemistry: Analyzing environmental impacts such as catalytic reactions in vehicles and the formation of pollutants.