AS & A Level Chemistry (9701) — May–June 2023, 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 · 13 marks · Practical skills (redox titration, recording quantitative data)
A redox reaction takes place between hydroxylamine, NH₂OH, and the iron(III) ion, Fe³⁺, in acidic conditions. The iron(III) ion is reduced to an iron(II) ion, Fe²⁺. The reaction…
Answer this question and get it marked →Question 2 · 12 marks · Practical skills (reaction kinetics, recording quantitative data)
The reaction between thiosulfate ions and hydrogen ions produces a precipitate of sulfur. When the concentration of hydrogen ions, [H⁺(aq)], is kept constant, the rate is…
Answer this question and get it marked →Question 3 · 15 marks · Qualitative analysis (thermal decomposition observations)
FA 5 is a solid mixture of two salts and contains two different anions. None of the ions present contains nitrogen. Place a small spatula measure of FA 5 in a hard-glass…
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