Question

The valency of ferric ion is ______ .

Answer 1

Iron:

• Iron is a chemical element having chemical symbol '$\mathbf{Fe}$' with atomic number 26.
• It is a metal which belongs to the transition series and group 9 of the periodic table.
• Being a transition metal, it shows variable valency of 2 and 3 called ferrous ion (${\mathbf{Fe}}^{\mathbf{2}\mathbf{+}}$) and ferric ion (${\mathbf{Fe}}^{\mathbf{3}\mathbf{+}}$) respectively.

Ferric ion:

• Iron 3⁺ is an ion of iron which carries a triple positive charge and is called as a ferric ion (${\mathbf{Fe}}^{\mathbf{3}\mathbf{+}}$).
• This happens when an iron atom loses three electrons and the formula becomes with valency 3.

Thus, the valency of ferric ions is 3.