What would you observe in the following case?
Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate.
When ammonium hydroxide is added with copper sulphate in small amount, a blue precipitate appears known as copper hydroxide. The reaction is as follows :
(Copper (Ammonium (Copper (Ammonium
suphate) hydroxide) hydroxide) suphate)
Blue ppt.
Further when ammonium hydroxide is added in excess, the blue precipitate that formed previously dissolved to form a deep blue solution known as tetraamminecoppersulphate. The reaction is as follows :
Ammonium hydroxide in excess :
(Copper (Ammonium (Ammonium (Tetraammine (Water)
hydroxide) suphate) hydroxide) coppersuphate)
in excess Deep blue solution