CH-698
Tests for cations
Chemistry · Secondary 3 · Medium · Tests for cations
Aqueous sodium hydroxide is added to a solution containing Cu²⁺ ions until in excess. What observation is expected?
- White precipitate soluble in excess NaOH
- Blue precipitate soluble in excess NaOH
- Blue precipitate insoluble in excess NaOH
- Green solution with no precipitate
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