Question

Ferric ion takes up ______ electron(s) to convert to ferrous ion.

Answer 1

Iron:

• Iron is a chemical element having chemical symbol $\mathbf{Fe}$ with the atomic number 26.
• It is a metal that 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.

A Ferric ion is reduced to a ferrous ion by accepting an electron from an electron donor.

$\underset{\mathrm{Ferric}\mathrm{ion}}{{\mathrm{Fe}}^{3+}}+\underset{\mathrm{Electron}}{{\mathrm{e}}^{-}}\to \underset{\mathrm{Ferrous}\mathrm{ion}}{{\mathrm{Fe}}^{2+}}$

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Thus, a ferric ion takes up one electron to convert to a ferrous ion.