Identify the Strongest Reducing Agent in the Following Half-Reactions A) Cr
B) MnO₂
C) Hg₂SO₄
D) Sn
E) Hg

Identify the strongest reducing agent in the following half-reactions. The standard reduction potentials are listed. $$\begin{array} { l l } - 0.95 \mathrm {~V} & \mathrm { SnO } _ { 2 } ( s ) + 2 \mathrm { H } _ { 2 } \mathrm { O } ( l ) + 4 \mathrm { e } ^ { - } \rightarrow \mathrm { Sn } ( s ) + 4 \mathrm { OH } - ( a q ) \\+ 0.61 \mathrm {~V} & \mathrm { Hg } _ { 2 } \mathrm { SO } _ { 4 } ( s ) + 2 \mathrm { e } ^ { - } \rightarrow 2 \mathrm { Hg } ( l ) + \mathrm { SO } _ { 4 } { } ^ { 2 } - ( a q ) \\- 1.48 \mathrm {~V} & \mathrm { Cr } ( \mathrm { OH } ) _ { 3 } ( s ) + 3 \mathrm { e } ^ { - } \rightarrow \mathrm { Cr } ( s ) + 3 \mathrm { OH } ^ { - } ( a q ) \\+ 1.22 \mathrm {~V} & \mathrm { MnO } _ { 2 } ( s ) + 4 \mathrm { H } ^ { + } ( a q ) + 2 \mathrm { e } ^ { - } \rightarrow \mathrm { Mn } ^ { 2 + } ( a q ) + 2 \mathrm { H } _ { 2 } \mathrm { O } ( l ) \end{array}$$

A) Cr
B) MnO₂
C) Hg₂SO₄
D) Sn
E) Hg