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  • On adding excess of ammonium hydroxide to an aqueous copper sulphate solutionOption: 1 Blue precipitate of copper hydroxide is obtained

On adding excess of ammonium hydroxide to an aqueous copper sulphate solution

Option: 1

Blue precipitate of copper hydroxide is obtained


Option: 2

Black precipitate of copper oxide is obtained


Option: 3

A deep blue solution is obtained


Option: 4

No change is observed


Answers (1)

best_answer

As we have learnt, 

Aqueous Copper Sulphate is blue in color. When excess ammonium hydroxide is added to it, the intensity of the color increases and a deep blue colored solution is obtained due to the formation of the tetra amine copper (II) complex.

\mathrm{4\ NH _{4} OH + \underset{Blue}{CuSO _{4} (aq.)} \rightarrow \underset{Deep\ Blue}{\left[ Cu \left( NH _{3}\right)_{4}\right] SO _{4}}+4 H _{2} O}

Hence, the correct answer is Option (3)

Posted by

vishal kumar

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