Chemistry 9701,35 Oct Nov 2024 | Cambridge AS - A Level Past Papers With Mark Scheme

1. Acid-Base Titration & Temperature Change | Determining sulfuric acid concentration using sodium hydroxide, recording temperature changes, graph plotting, and extrapolating intersection points.

2. Carbonate Neutralization & Gas Measurement | Measuring CO₂ mass from sodium carbonate and sulfuric acid reaction, verifying excess reagent, and calculating acid concentration.

3. Error Analysis & Apparatus Selection | Evaluating uncertainties in balance measurements, comparing conical flask vs. beaker for accuracy, and explaining unsuitable alternative reactions.

4. Qualitative Analysis of Transition Metal Compounds | Heating and dissolving metal compounds, reaction tests with Fe²⁺, H₂O₂, AgNO₃, BaCl₂, and NaOH, and gas evolution observations.

5. Oxidation States & Chemical Identification | Identifying metal common to FA 4, FA 5, and FA 6, determining oxidation states through qualitative tests, and interpreting reaction color changes.

6. Practical Chemistry Techniques & Observations | Recording precise observations, recognizing precipitate solubility, distinguishing between cation and anion reactions, and verifying gas evolution tests.