CH-1602

Tests for cations

Chemistry · Secondary 4 · Medium · Tests for cations

Aqueous solution Z contains a metal ion. When aqueous sodium hydroxide is added dropwise, a white precipitate forms. On adding excess aqueous sodium hydroxide, the white precipitate dissolves to give a colourless solution.

Which ion is most likely present in solution Z?

$Al^{3+}$
$Ca^{2+}$
$Mg^{2+}$
$Cu^{2+}$

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