Question

When ammonium hydroxide is added to solution В, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. Name the cation present in solution В.

Answer 1

Copper(II) ion, Cu²⁺

Explanation:

Copper(II) ions form a pale blue precipitate with ammonium hydroxide, which dissolves in excess ammonium hydroxide to give an inky blue solution.