AS & A Level Chemistry (9701) — May–June 2024, 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 · Planning, Analysis and Evaluation - preparing a standard solution from a solid
Titration can be used to determine the concentration of dissolved oxygen in samples of river water. Procedure: step 1 - use five 50 cm3 graduated syringes, A, B, C, D and E, to…
Answer this question and get it marked →Question 2 · 14 marks · Planning, Analysis and Evaluation - controlling temperature
The activation energy, EA, for the reaction between dilute hydrochloric acid, HCl(aq), and aqueous sodium thiosulfate, Na2S2O3(aq), can be determined by an initial rates method.…
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