AS & A Level Chemistry (9701) — May–June 2025, Paper 52
2 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 20 marks · Practical skills: solution preparation, moles, volumetric flask
Activated carbon is a form of carbon with the ability to adsorb solutes from solutions. The adsorption of ethanedioic acid molecules, (COOH)₂, from dilute ethanedioic acid,…
Answer this question and get it marked →Question 2 · 10 marks · Practical skills: combustion calorimetry, data recording
The enthalpy change of combustion, ΔHc, of butane, C₄H₁₀, can be determined using the apparatus shown in Fig. 2.1 (metal can of water heated by a gas burner). Steps: 1. Use a 500…
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