# How does the reaction between copper ion and hydroxide ion proceed?

$C {u}^{2 +} + 2 H {O}^{-} \rightarrow C u {\left(O H\right)}_{2} \left(s\right) \downarrow$
What would you see in this reaction; i.e. what is the colour of $C {u}^{2 +} \left(a q\right)$ ion, and what is the colour/appearance of the $C u {\left(O H\right)}_{2}$ precipitate?