Andhra Pradesh Board Solutions for Chapter: Electrochemistry and Chemical Kinetics, Exercise 2: Intext Questions

Calculate the potential of hydrogen electrode in contact with a solution whose $\mathrm{p}\mathrm{H}$ is $10.$ 

Calculate the emf of the cell in which the following reaction takes place:
$\mathrm{N}\mathrm{i}\left(\mathrm{s}\right)+2\mathrm{A}{\mathrm{g}}^{+}\left(0.002\mathrm{}\mathrm{M}\right)\to \mathrm{N}{\mathrm{i}}^{2+}\left(0.160\mathrm{}\mathrm{M}\right)+2\mathrm{A}\mathrm{g}\left(\mathrm{s}\right)$ 
Given that ${\mathrm{E}}_{\left(\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}\right)}^{⊝}=1.05 \mathrm{V}$

The cell in which the following reaction occurs: 
$2\mathrm{F}{\mathrm{e}}_{\mathrm{}}^{3+}\left(\mathrm{a}\mathrm{q}\right)+2{\mathrm{I}}_{\mathrm{}}^{-}\left(\mathrm{a}\mathrm{q}\right)\to 2\mathrm{F}{\mathrm{e}}_{\mathrm{}}^{2+}\left(\mathrm{a}\mathrm{q}\right)+{\mathrm{I}}_2\left(\mathrm{s}\right)$ has ${\mathrm{E}}_{\mathrm{c}\mathrm{e}\mathrm{l}\mathrm{l}}^0=0.236 \mathrm{V}$ at $298 \mathrm{K}.$ Calculate the standard Gibbs energy and the equilibrium constant of the cell reaction.