O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2020 · Q151 Mark

An aqueous solution contains 0.01 mol of Zn²⁺(aq) and 0.01 mol of Cu²⁺(aq). Aqueous sodium hydroxide is added until in excess. After shaking, the mixture is filtered. What remains on the filter paper?

A0.01 mol of a white hydroxide and 0.01 mol of a blue hydroxide

B0.01 mol of a white hydroxide

C0.01 mol of a blue hydroxide

Dno solid residue

✓ Correct answer

C: 0.01 mol of a blue hydroxide

Oracle Prep sorts past-paper questions by topic, so you can drill Acids, Bases & Salts and see which topics are most likely to come up next.

Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2020 Paper 1 Variant 1, question 15.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content