In a mixture solution of 0.05 mol L-1 NiCl2, 0.05 mol L-1 ZnCl2, and 0.5 mol L-1

HBO3 at pH 3.5, use Nernst equation to work out the potential window, in which a

thin film of pure nickel can be electrodeposited onto the steel substrate from this

mixture solution at 25 oC, and show the steps of your calculations. (The standard

reduction electrode potentials for redox couples Ni2+/Ni and Zn2+/Zn are -0.250 V

and -0.763 V vs Standard Hydrogen Electrode (SHE), respectively. R = 8.314 J (mol

K)-1, F = 96500 C mol-1).

I have so far managed to determine the overall chemical potential but don't know how to do the rest.