IGCSE Chemistry (0971) — May–June 2025, Paper 51
3 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 19 marks · Experimental techniques and chemical analysis - rate of reaction
Read all of the instructions carefully before starting the experiments. You are going to do five experiments. Experiment 1 - Use the 50 cm3 measuring cylinder to pour 30 cm3 of…
Answer this question and get it marked →Question 2 · 15 marks · Experimental techniques and chemical analysis - qualitative analysis
You are provided with two solids: solid F and solid G. Do the following tests on solid F and solid G. Record all of your observations at each stage. Tests on solid F To the…
Answer this question and get it marked →Question 3 · 6 marks · Experimental techniques and chemical analysis - planning an investigation (energetics)
Solid sodium hydrogencarbonate, NaHCO3, reacts with dilute hydrochloric acid and with dilute ethanoic acid. NaHCO3(s) + HCl(aq) - NaCl(aq) + CO2(g) + H2O(l) NaHCO3(s) +…
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