Consider the following standard reduction potentials. $$\begin{array} { | l | c | }
\hline { \text { Reduction Half-Reaction } } & \mathbf { E } ^ { 0 } \text { (volts) } \
\hline \mathrm { Fe } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Fe } ( s ) & - 0.45 \
\hline \mathrm { Cu } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Cu } ( s ) & + 0.34 \
\hline \mathrm { Zn } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Zn } ( s ) & - 0.76 \
\hline \mathrm { Al } ^ { 3 + } ( a q ) + 3 \mathrm { e } ^ { - } \longrightarrow \mathrm { Al } ( s ) & - 1.66 \
\hline \mathrm { Sn } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Sn } ( s ) & - 0.14 \
\hline
\end{array}$$ Which corrosion reaction when two metals come in contact is not likely to occur?

Question

Consider the following standard reduction potentials. $$\begin{array} { | l | c | } 
\hline { \text { Reduction Half-Reaction } } & \mathbf { E } ^ { 0 } \text { (volts) } \
\hline \mathrm { Fe } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Fe } ( s ) & - 0.45 \
\hline \mathrm { Cu } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Cu } ( s ) & + 0.34 \
\hline \mathrm { Zn } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Zn } ( s ) & - 0.76 \
\hline \mathrm { Al } ^ { 3 + } ( a q ) + 3 \mathrm { e } ^ { - } \longrightarrow \mathrm { Al } ( s ) & - 1.66 \
\hline \mathrm { Sn } ^ { 2 + } ( a q ) + 2 \mathrm { e } ^ { - } \longrightarrow \mathrm { Sn } ( s ) & - 0.14 \
\hline
\end{array}$$ Which corrosion reaction when two metals come in contact is not likely to occur?

Quizplus · Accepted Answer

The reduction potential for aluminum ions is much lower than that for iron ions, making the reduction of aluminum ions less favorable compared to the oxidation of iron.

Consider the Following Standard Reduction Potentials Which Corrosion Reaction When Two Metals Come in Contact Is