$($h$)$ Oxidation: $F{e}^{2+}F{e}^{3+}+e^{-}$

Reduction: $A{u}^{3+}+3e^{-}Au$

Net:$3F{e}^{2+}+A{u}^{3+}Au+3F{e}^{3+}$

What is the standard potential, $E$ net $?$

Standard Reduction Potentials

Reduction Half$-$Reaction $E(V)$

$C{o}^{3+}+e^{-}longrightarrowC{o}^{2+},1\mathrm{.}82$

$A{u}^{3+}+3e-,Au(s),1\mathrm{.}50$

$P{d}^{2+}+2e^{-}$longrightarrowPd,$0\mathrm{.}987$

$A{g}^{+}+e-,$longrightarrowAg$(s),0\mathrm{.}80$

$F{e}^{3+}+e-,longrightarrowF{e}^{2+},0\mathrm{.}771$

$C{u}^{+}+e-,$longrightarrowCu$(s),0\mathrm{.}52$

$C{u}^{2+}+2e^{-}Cu(s),0\mathrm{.}337$

$C{u}^{2+}+e^{-}C{u}^{+},0\mathrm{.}153$

$2H^{+}+2e^{-}longrightarrow{H}_2(g),0\mathrm{.}00$

$S{n}^{2+}+2e^{-}$longrightarrowSn$(s),-0\mathrm{.}14$

$C{o}^{2+}+2e-$longrightarrowCo$(s),-0\mathrm{.}28$

$C{r}^{3+}+e-,longrightarrowC{r}^{2+},-0\mathrm{.}41$

$F{e}^{2+}+2e^{-}$longrightarrowFe$(s),-0\mathrm{.}44$

$C{r}^{3+}+3e-,$longrightarrowCr$(s),-0\mathrm{.}74$

$Z{n}^{2+}+2e^{-}$longrightarrowZn$(s),-0\mathrm{.}763$

$A{l}^{3+}+3e-,,Al(s),-1\mathrm{.}66$

$E$ net $=,V$