Chemistry 9701,33 Oct Nov 2024 | Cambridge AS - A Level Past Papers With Mark Scheme

1. Determination of Metal Carbonate Mr | Reaction of a metal carbonate with hydrochloric acid, mass loss measurement, and calculation of relative formula mass (Mr).

2. Effect of Temperature on Reaction Rate | Impact of using colder acid on CO₂ production, explanation of experimental accuracy, and flask positioning for improved reaction efficiency.

3. Titration of Metal Carbonate Solution | Standardization using hydrochloric acid, calculation of metal carbonate concentration, and determination of its Mr using titration results.

4. Hydrated Salt Analysis | Calculation of water of crystallization (x) in hydrated sodium carbonate and an alternative method to determine x without acid reactions.

5. Qualitative Analysis of Salts | Heating a salt mixture to identify decomposition gases, reaction of residues with sulfuric acid, and equation balancing for observations.

6. Cation and Anion Identification | Systematic testing for metal ions, precipitate formation with NaOH and NH₃, confirmation of anions using barium chloride and silver nitrate, and recognition of redox reactions.