Chemistry 9701/35 May June 2010 | Cambridge AS Level Past Papers With Mark Scheme

1. Calculation of the molar enthalpy change for the decomposition of sodium hydrogencarbonate (NaHCO₃), involving reactions with hydrochloric acid and the measurement of temperature changes.
2. Neutralization reactions for NaHCO₃ and Na₂CO₃ with HCl, including experimental setup for measuring temperature changes and determining heat energy changes.
3. Calculation of the enthalpy change of neutralization for NaHCO₃ and Na₂CO₃, using temperature data to compute heat energy changes and moles of reactants.
4. Evaluation of differences in enthalpy changes, including comparison of results with an alternative method for NaHCO₃ decomposition.
5. Identification and analysis of anions and cations in solutions using qualitative analysis methods, including tests for carbonate and chloride ions.
6. Application of standard chemical methods for titration, precipitation, and other tests for determining the presence of specific ions in laboratory samples.