Which of the following equations is balanced for both atoms and charge with the…

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

Problem

Which of the following equations is balanced for both atoms and charge with the smallest whole-number coefficients for the reaction that occurs in acidic solution? MnO4−+Fe2+→Mn2++Fe3+\text{MnO}_4^- + \text{Fe}^{2+} \rightarrow \text{Mn}^{2+} + \text{Fe}^{3+} (a) MnO4−+5Fe2++4H+→Mn2++5Fe3++2H2O\text{MnO}_4^- + 5\text{Fe}^{2+} + 4\text{H}^+ \rightarrow \text{Mn}^{2+} + 5\text{Fe}^{3+} + 2\text{H}_2\text{O} (b) MnO4−+5Fe2++8H+→Mn2++5Fe3++4H2O\text{MnO}_4^- + 5\text{Fe}^{2+} + 8\text{H}^+ \rightarrow \text{Mn}^{2+} + 5\text{Fe}^{3+} + 4\text{H}_2\text{O} (c) MnO4−+Fe2++8H+→Mn2++Fe3++4H2O\text{MnO}_4^- + \text{Fe}^{2+} + 8\text{H}^+ \rightarrow \text{Mn}^{2+} + \text{Fe}^{3+} + 4\text{H}_2\text{O} (d) 2MnO4−+10Fe2++16H+→2Mn2++10Fe3++8H2O2\text{MnO}_4^- + 10\text{Fe}^{2+} + 16\text{H}^+ \rightarrow 2\text{Mn}^{2+} + 10\text{Fe}^{3+} + 8\text{H}_2\text{O}

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