Chemistry · Oct / Nov 2020 · Paper 12 · Question 6
5070Identification of ions and gases
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)
As printed in the paper
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Correct answer: A. Al³⁺(aq)
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