Question

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

Answer 1

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.

$C{u}^{+2}\left(aq\right)+4N{H}_3\to \left[Cu\right(N{H}_3{)}_4{]}^{2+}\left(aq\right)$
$\left(blue\right)$ $\left(Deepblue\right)$