Question
Formulate a cell from the following electrode reactions :
$ A u _{( aq )}^{3+}+ 3 e ^{-} \longrightarrow A u _{( s )}$
$M g _{( s )} \longrightarrow M g _{( aq )}^{2+}+2 e ^{-}$
$ A u _{( aq )}^{3+}+ 3 e ^{-} \longrightarrow A u _{( s )}$
$M g _{( s )} \longrightarrow M g _{( aq )}^{2+}+2 e ^{-}$