AS & A Level Chemistry (9701) — October–November 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 · 13 marks · Planning: safety precautions
A student uses the following method to determine the percentage by mass of the painkiller aspirin, C9H8O4(s), in some tablets. step 1: Grind five tablets into a powder. step 2:…
Answer this question and get it marked →Question 2 · 17 marks · Analysis: colorimetry
Crystal violet, C25H30N3Cl(s), is a purple dye. Some light is absorbed when it passes through C25H30N3Cl(aq). Absorbance is the proportion of light absorbed at a particular…
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