AS & A Level Chemistry (9701) — May–June 2025, Paper 33
3 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 14 marks · Practical skills: titration technique, recording data
You will carry out a titration to determine the concentration of hydrogen peroxide, H2O2, in solution FA 1. The reaction of hydrogen peroxide with acidified potassium permanganate…
Answer this question and get it marked →Question 2 · 10 marks · Practical skills: calorimetry, recording data
In this question you will use the calorimetric method to determine the concentration of H2O2 in FA 1. Manganese(IV) oxide, MnO2 (FA 5), acts as a catalyst for the decomposition of…
Answer this question and get it marked →Question 3 · 16 marks · Practical skills: qualitative analysis, redox reactions of MnO2
FA 2 is aqueous potassium permanganate, KMnO4. FA 5 is manganese(IV) oxide, MnO2. FA 6 is aqueous iron(III) chloride, FeCl3. (i) Use a spatula to transfer a small amount of FA 5…
Answer this question and get it marked →