CH-1614
Tests for cations
Chemistry · Secondary 4 · Medium · Tests for cations
An aqueous solution of metal ion X gives a white precipitate with aqueous sodium hydroxide that dissolves in excess to form a colourless solution. With aqueous ammonia, it also gives a white precipitate that dissolves in excess to form a colourless solution. Which cation is X?
- aluminium, Al³⁺
- lead(II), Pb²⁺
- zinc, Zn²⁺
- calcium, Ca²⁺
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