A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2023 · Q51 Mark

Separate samples, each of mass 1.0 g, of the compounds listed are treated with an excess of dilute acid. Which compound releases the largest amount of CO₂?

A1.0 g CaCO₃

B1.0 g Li₂CO₃

C1.0 g MgCO₃

D1.0 g Na₂CO₃

✓ Correct answer

B: 1.0 g Li₂CO₃

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 5.

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