Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution: Na+(aq)+e−→Na(s) E0=−2.71 V H+(aq)+e−→12H2(g) E0=0.00 V On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why? (b) Why does the cell potential of mercury cell reamin constant throughout its life?

Following reactions occur at cathode during the electrolysis of aqueou

1.	Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution: Na+(aq)+e−→Na(s) E0=−2.71 V H+(aq)+e−→12H2(g) E0=0.00 V On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why? (b) Why does the cell potential of mercury cell reamin constant throughout its life?
Answer» Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution: $N a^{+} (a q) + e^{-} \to N a (s) E^{0} = - 2.71 V$ $H^{+} (a q) + e^{-} \to \frac{1}{2} H_{2} (g) E^{0} = 0.00 V$ On the basis of their standard reduction electrode potential $(E^{0})$ values, which reaction is feasible at the cathode and why? (b) Why does the cell potential of mercury cell reamin constant throughout its life?