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A-LevelChemistryGroup 29701/12 · May/June 2017 · Q151 Mark

Calcium oxide is added to water and the resulting mixture is filtered. This filtrate is X. When carbon dioxide is bubbled through filtrate X, a white precipitate is formed. Which equation for this reaction of filtrate X with carbon dioxide is correct?

ACaO + CO₂ → CaCO₃

BCa(OH)₂ + CO₂ → CaO + H₂CO₃

C2CaO + H₂O + CO₂ → CaCO₃ + Ca(OH)₂

DCa(OH)₂ + CO₂ → CaCO₃ + H₂O

✓ Correct answer

D: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O

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About this question

Topic: Group 2, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2017 Paper 1 Variant 2, question 15.

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