O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2020 · Q61 Mark

When aqueous sodium hydroxide is added to a solution, a white precipitate forms which dissolves when excess sodium hydroxide is added. Which ion could be present in the solution?

AAl³+(aq)

BCa²+(aq)

CCu²+(aq)

DNa+(aq)

✓ Correct answer

A: Al³+(aq)

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 1, question 6.

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