Question

Select the correct answer from the list in the bracket:

The cation discharged at the cathode most readily, $\left({\mathrm{Fe}}^{2+},{\mathrm{Cu}}^{2+},{\mathrm{Pb}}^{2+},{\mathrm{H}}^{+}\right)$

Answer 1

• The cation discharged at the most readily is ${\mathrm{Cu}}^{2+}$.
• According to the electrochemical series of reactivity ${\mathrm{Cu}}^{2+}$ is more reactive than $\left({\mathrm{Fe}}^{2+},{\mathrm{Pb}}^{2+},{\mathrm{H}}^{+}\right)$.
  Therefore, ${\mathrm{Cu}}^{2+}$will discharge most readily among $\left({\mathrm{Fe}}^{2+},{\mathrm{Pb}}^{2+},{\mathrm{H}}^{+}\right)$.