The two half-reactions below occur in acidic solution

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

The two half-reactions below occur in acidic solution. Oxidation:

\mathrm{Sn^{2+} \rightarrow Sn^{4+} + 2e^-}

Reduction:

\mathrm{MnO_4^- + 8H^+ + 5e^- \rightarrow Mn^{2+} + 4H_2O}

Which overall equation is correctly balanced for both atoms and net charge? (a)

\mathrm{5Sn^{2+} + 2MnO_4^- + 8H^+ \rightarrow 5Sn^{4+} + 2Mn^{2+} + 4H_2O}

(b)

\mathrm{Sn^{2+} + MnO_4^- + 8H^+ \rightarrow Sn^{4+} + Mn^{2+} + 4H_2O}

(c)

\mathrm{5Sn^{2+} + 2MnO_4^- + 16H^+ \rightarrow 5Sn^{4+} + 2Mn^{2+} + 8H_2O}

(d)

\mathrm{Sn^{2+} + 2MnO_4^- + 16H^+ \rightarrow Sn^{4+} + 2Mn^{2+} + 8H_2O}