CH-1616
Tests for cations
Chemistry · Secondary 4 · Easy · Tests for cations
A student tests an unknown solution X with aqueous sodium hydroxide. A light blue precipitate forms, which dissolves in excess sodium hydroxide to give a deep blue solution. What cation is present in X?
- copper(II) ion, Cu²⁺
- iron(II) ion, Fe²⁺
- iron(III) ion, Fe³⁺
- zinc ion, Zn²⁺
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