\(Cu \rightarrow Cu ^{2+}+2 e ^{-}\)

At cathode

\(2 Ag ^{+}+2 e ^{-} \rightarrow 2 Ag\)

Cell reaction \(\rightarrow Cu +2 Ag ^{+} \rightarrow Cu ^{2+}+2 Ag\)

\(E _{\text {cell }}= E _{\text {cell }}^{0}-\frac{0.06}{2} \log \frac{\left[ Cu ^{2+}\right]}{\left[ Ag ^{+}\right]^{2}}\)

\(0.43= E _{\text {cell }}^{0}-\frac{0.06}{2} \log \frac{(0.001)}{(0.01)^{2}}\)

\(E _{\text {ceil }}^{0}=0.46\)

\(E _{\text {cell }}^{0}= E _{ Ag ^{+} / Ag }^{0}- E _{ Cu ^{2+} / Cu }^{0}\)

\(0.46=0.80- E _{ Cu ^{2+} / Cu }^{0}\)

\(E _{ Cu ^{2+} / Cu }^{0}=0.34\) volt

\(E _{ Cu ^{2+} / Cu }^{0}=34 \times 10^{-2}\)