The half-reaction describes the oxidation of iron(II) ion

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

The half-reaction

\mathrm{Fe^{2+}(aq) \;\rightarrow\; Fe^{3+}(aq) + e^-}

describes the oxidation of iron(II) ion. How many moles of electrons are lost when

0.40\,\text{mol}

\mathrm{Fe^{2+}}

is oxidized completely according to this half-reaction? (a)

0.80\,\text{mol}

(b)

1.2\,\text{mol}

(c)

0.20\,\text{mol}

(d)

0.40\,\text{mol}