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A-LevelChemistryGroup 29701/12 · Oct/Nov 2019 · Q141 Mark

When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are mixed, a white precipitate, Y, forms. The mixture is filtered and carbon dioxide is bubbled through the filtrate, producing a second white precipitate, Z. What are Y and Z?

AY: Ba(OH)₂, Z: Ca(OH)₂

BY: Ba(OH)₂, Z: CaCO₃

CY: Ca(OH)₂, Z: BaCO₃

DY: Ca(OH)₂, Z: Ba(OH)₂

✓ Correct answer

C: Y: Ca(OH)₂, Z: BaCO₃

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About this question

Topic: Group 2, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 14.

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