AS & A Level Chemistry (9701) — May–June 2025, Paper 53
2 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 16 marks · Practical skills: safety precautions, hazard data
Grignard reagents have the general formula RMgX, where R is a hydrocarbon group and X is a halogen. The Grignard reagent C₆H₅MgBr is used as an intermediate in the reaction…
Answer this question and get it marked →Question 2 · 14 marks · Kinetics: rate constant, effect of temperature and concentration on rate
An experiment is carried out to determine the rate constant, k, for the hydrolysis of ethyl ethanoate, CH₃COOC₂H₅, using a hydrochloric acid, HCl(aq), catalyst. The equation:…
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