Standard Reduction Potential

Resolved Question
Standard reduction potential for Pt2+/Pt?

An electrochemical cell of notation Pt/Pt2+ Ni2+/Ni has Eo = -1.45 V.
If we know that the standard reduction potential of Ni2+/Ni is Eo = -0.25 V,
what is the standard reduction potential for Pt2+/Pt?

Chemistry
Best Answer - Chosen by Asker

From the cell diagram given,
E(Pt2+/Pt) = aode (oxidation) and
E(Ni2+/Ni) = cathode (reduction)

Eo cell = E (reduction) - E ( oxidation)
.......... = E (Ni2+/Ni) - E (Pt2+/Pt)
-1.45 = -0.25 - E(Pt2+/Pt)E(Pt2+/Pt)
= 1.45 - 0.25
= 1.20 V

Asker's Comment:
Thank you