CH-1638
Tests for cations
Chemistry · Secondary 4 · Easy · Tests for cations
A solution gives no precipitate with aqueous sodium hydroxide. On warming with sodium hydroxide, a gas is produced that turns damp red litmus paper blue. Which cation is present?
- ammonium, NH₄⁺
- calcium, Ca²⁺
- iron(III), Fe³⁺
- zinc, Zn²⁺
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