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A crystalline solid A dissolves in water to give a solution containing the metal complex ion B.

A crystalline solid A dissolves in water to give a solution containing the metal complex ion B.
Addition of aqueous silver nitrate to this solution gives a white precipitate of C which dissolves when an excess of dilute aqueous ammonia is added to form a solution containing the metal complex ion D.
The solution of A becomes a pale blue solution containing metal complex ion E when an excess of concentrated hydrochloric acid is added.
When concentrated aqueous ammonia is added dropwise to a solution of A, a blue-green precipitate F forms.  This then dissolves when an excess of ammonia is added to form a pale brown solution containing the metal complex ion G.  This pale brown solution becomes dark brown on standing in air and a solution containing the metal complex ion H is formed.

Identify, by formula, each of the species lettered B to H and finally the solid A.

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