How does ammonia react with a solution of $C u^{2 +}$ ?

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Solution

Reaction of ammonia with solution of $C u^{2 +}$

Ammonia is a Lewis base due to the presence of a lone pair of electrons on the nitrogen atom of the ammonia molecule. It forms a linkage with metal ions by donating the electron pair.

The complex formed is tetraammine copper(II) and it forms deep blue solution.

$C u^{+ 2} (a q) + 4 N H_{3} \to [C u (N H_{3})_{4}]^{2 +} (a q)$
$(b l u e)$ $(D e e p b l u e)$

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