Question

Following reactions can occur at cathode during the electrolysis of aqueous silver nitrate solution using Pt electrodes:

Ag⁺(aq) + e^- → Ag(s) : E° = 0.80 V

H⁺(aq) + e^- → 1/2H₂(g) : E° = 0.00 V

On the basis of their standard electrode potential values, which reaction is feasible at cathode and why ?

Answer 1

Ag⁺(aq) + e^- → Ag(s)

Because it has higher reduction potential.

Detailed Answer: 

As reaction with higher value of standard electrode potential occurs at cathode get reduced. So, the reaction occurring at cathode is 

Ag⁺(aq) + e^- → Ag(s)