CH-1648
Tests for cations
Chemistry · Secondary 4 · Easy · Tests for cations
A colourless solution gives a light blue precipitate with aqueous sodium hydroxide that is insoluble in excess. With aqueous ammonia, it gives a light blue precipitate that dissolves in excess to form a dark blue solution. Which cation is present?
- aluminium, Al³⁺
- copper(II), Cu²⁺
- iron(II), Fe²⁺
- zinc, Zn²⁺
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