How will the current $($i$)$ at a stationary working electrode change with time for a typical

potential$-$step electrochemical experiment where the potential of a working electrode $(2$

nun in diameter$)$ is switched from positive o $($negative ehough value to eliminate all

For all plots, $y-$ and $x-$axis are current and time, respectively.

$)$; $$

All the following questions refer to cyclic voltammetry of a reversible redox couple denoted

by $(O+1e^{**}R).$

$(1)$ Name two criteria in the voltammogram that can be used to confirm that this redox

reaction is indeed reversible.

$(2)$ What would be the activity ratio of reactant $O$ to product $R$ at the surface of a working

electrode when the potential is $120mV$ positive of the former potential?

$(3)$ How would peak currents of the oxidation and reduction peaks change with the scan rate

of potential?

$(4)$ How can one confirm the oxidation peak associated with the $O+1e^{+}R$ reaction is

diffusion controlled?