A-LevelChemistryGroup 2Oct/Nov 2019Paper 1 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
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The correct answer is C. This question tests the candidate's understanding of group 2 within the Chemistrysyllabus. The examiner's mark scheme requires...
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