Chemistry 9701/52 Oct Nov 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Determination of relative molecular mass (Mr) of volatile liquids using mass, temperature, volume, and ideal gas law with considerations for temperature and pressure inaccuracies affecting Mr calculation.
2. Use of Victor Meyer tube for vaporizing volatile liquids, capturing and measuring expelled gas, and associated hazards like flammability.
3. Analysis of heat changes from reactions of barium hydroxide with hydrochloric acid using temperature rise, graphing, and calculation of hydrochloric acid concentration at reaction equivalence.
4. Sources of error in experimental setups, including heat loss and equipment limitations, along with suggested improvements like better insulation and precise measurement techniques.
5. Comparison of reactions of hydrochloric acid and ethanoic acid with barium hydroxide, analyzing expected temperature changes and acid strength differences.
6. Application of thermodynamics and calorimetry principles to assess reaction enthalpy changes and improve experimental accuracy in thermal reaction studies.