Chemistry 9701/34 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Quantitative Analysis - Iron Wire: Titrating iron(II) sulfate with potassium manganate(VII) to determine the percentage by mass of iron in a sample. Includes titration procedure, volume calculations, and mass determination of iron.
2. Neutralization Experiment: Determining the concentration of dilute sulfuric acid (FB 3) by titrating with sodium hydroxide. Involves plotting temperature change vs. volume added and calculating moles and concentration of sulfuric acid.
3. Qualitative Analysis: Testing for cations and anions in samples FB 5, FB 6, and FB 7 using reagents like potassium manganate(VII), silver nitrate, and barium nitrate. Includes observing color changes, precipitation, and gas formation, and identifying ions.
4. Student's Method Critique: Evaluating the suggestion of determining iron moles by titrating excess acid, explaining its feasibility.
5. Further Testing: Using additional tests to identify the cations in FB 6 and FB 7, including possible ionic equations for reactions observed during testing.