Question

Addition of excess ammonium hydroxide into copper sulphate solution​

Answer 1

if it is done so then a small amount of copper hydroxide will form the reaction that this percipitate is a very pale blue colour and will look white against the dark blue of Surrounding solution............

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Answer 2

Explanation:

....when concentrated ammonia solution ( ammonium hydroxide) is added to a clear light blue , aqueous solution of copper( II) chloride , a powdery light blue precipitate of copper II hydroxide forms .

Further addition of ammonia cause the copper ion to go back into solution as a deep blue ammonia complex.

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