Write a shorthand cell diagram, and calculate the standard cell potential (E°

Question

The following half-reactions are joined to form a galvanic cell that generates a current under standard conditions. Identify what is oxidized and what is reduced. Write a shorthand cell diagram, and calculate the standard cell potential (E°).



2 H+(aq) + 2 e- → H2(g) and Ni2+(aq) + 2 e- → Ni(s)

Answer 1

Looking up the standard reduction potential for Ni2+ + 2e- ===> Ni(s), I find it to be -0.23 V

Standard reduction potential for 2H+ + 2e- ===> H2(g) is 0 V

Thus, H+ will be reduced (cathode) and Ni(s) will be oxidized (anode)

Eºcell = cathode - anode = 0 - (-.023)

Eºcell = +0.23 V