# Question 758dc

Dec 16, 2016

This is $F {e}^{3 +}$ ion.........., i.e. $\text{ferric ion, Fe(III)}$
${\left[F e {\left(C \equiv N\right)}_{6}\right]}^{3 -}$ is the complex ion, that is composed of a $F {e}^{3 +}$ centre, and 6xx""N-=C^(-) ligands.
Of course, the resultant complex preserves the ionic charge of its consituent ligands and metal centre, and the net charge is 6xx(-1)+3=??#
If the counterion were potassium, i.e. ${K}^{+}$, what salt would likely precipitate from solution?