IGCSE Chemistry (0620) — May–June 2025, Paper 61
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 9 marks · ATP: experimental techniques and measurement
Complete Table 1.1 by calculating the volume of dilute sulfuric acid added to the conical flask.
Answer this question and get it marked →Question 2 · 17 marks · ATP: reading instruments and recording data
Use the stop-watch diagrams to complete Table 2.1. Table 2.1 experiment acid concentration of acid in mol/dm^3 stop-watch diagram time for magnesium to disappear in s --- --- ---…
Answer this question and get it marked →Question 3 · 8 marks · ATP: qualitative analysis - tests for gases
The student adds about 15 cm^3 of dilute hydrochloric acid to the sample of solid F (calcium carbonate) in a boiling tube and tests any gas produced. State the observations.
Answer this question and get it marked →Question 4 · 6 marks · ATP: 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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