CHXII09:COORDINATION COMPOUNDS
322040
\({\left[ {{\rm{Fe}}{{({\rm{CN}})}_6}} \right]^{3 - }}\) ion is
1 hexacyanoferrate (II) ion
2 hexacyanoferrate (III) ion
3 hexacyanide iron (III) ion
4 iron (III) hexacyanide ion
Explanation:
\({[{\rm{Fe}}{({\rm{CN}})_6}]^{3 - }}\)
Let the oxidation number of \({[{\rm{Fe}}{({\rm{CN}})_6}]^{3 - }}\) be x
\[\begin{array}{l}
{\rm{x}} + ( - 1) \times 6 = - 3\\
{\rm{x}} - 6 = - 3\\
\Rightarrow {\rm{x}} = + 3
\end{array}\]
IUPAC name is hexacyanoferrate (III) ion.