Question

Give two relevant examples for each of the followings

• ammonium hydroxide solutionis addedo copper (II) nitratesolution in small quantities and then in excess
• ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess

Answer 1

1) A pale blue or bluish white precipitate is formed which dissolves in excess of Ammonium hydroxide and gives inky blue solution.

2) A white precipitate is formed which dissolves in excess of Ammonium hydroxide.