What is the decreasing order of deposition of metal on electrode if standard reduction potentials are given…
What is the decreasing order of deposition of metal on electrode if standard reduction potentials are given as -
$\mathrm{Ag}^{+}\left|\mathrm{Ag}=0.80 \mathrm{~V}, \mathrm{Cu}^{2+}\right| \mathrm{Cu}=0.337 \mathrm{~V}$
$\mathrm{Sn}^{2+}\left|\mathrm{Sn}=-0.136 \mathrm{~V}, \mathrm{Cd}^{2+}\right| \mathrm{Cd}=-0.403 \mathrm{~V}$
Higher the standard reduction potential $\left(\mathbb{E}^{\circ}\right)$ value, greater the tendency of the species to accept electrons and undergo reduction.
Order of $\mathrm{E}_{\text {red }}^0: \mathrm{Ag}^{+} \gt \mathrm{Cu}^{2+} \gt \mathrm{Sn}^{2+} \gt \mathrm{Cd}^{2+}$
$\therefore \quad$ Decreasing order of deposition of metal on electrode is as follows: $\mathrm{Ag} \gt \mathrm{Cu} \gt \mathrm{Sn} \gt \mathrm{Cd}$.