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How does ammonia react with a solution o...

How does ammonia react with a solution of `"Cu"^(2+)` ?

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When ammonia (aqueous solution is ammonium hydroxide) reacts with a solution of `"Cu"^(2+)`, a deep blue solution is obtained due to the formation of tetraamine copper (II) ion.
`"Cu"^(2+)("aq")+4"NH"_(4)"OH"("aq")tounderset(("Deep blue solution"))underset("(II) ion")underset("Tetraamine copper")(["Cu"("NH"_(3))_(4)]^(2))+4"H"_(2)"O"`
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