AS & A Level Chemistry (9701) — May–June 2024, Paper 51
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: planning (solution preparation)
Aqueous sodium thiosulfate can be prepared from Na2S2O3.5H2O(s). (i) Determine the mass, in g, of Na2S2O3.5H2O(s) required to prepare 500.0 cm3 of 0.00200 mol dm-3 Na2S2O3(aq).…
Answer this question and get it marked →Question 2 · 14 marks · Practical skills: planning (rate experiments)
Suggest a reason why it is necessary to wait for 10 minutes in step 5.
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