Using a table of standard electrode potentials (as in Appendix M of your text), calculate the standard cell potential, Eo, for: 2 Fe2+(aq) + Cl2(g) 2 Fe3+(aq) + 2 Cl(aq).

Question

Using a table of standard electrode potentials (as in Appendix M of your text), calculate the standard cell potential, Eo, for: 2 Fe2+(aq) + Cl2(g)  2 Fe3+(aq) + 2 Cl(aq).

Answer:

Anode: 2 Fe2+  2 Fe3+ + 2 e	
Eox = 0.771 V
Cathode: Cl2 + 2 e  2 Cl		Ered = +1.36 V			
Enet = +0.59 V

DrBob222 · Answer

I think Eox = -0.771 and
Ered = +1.36
Then 1.36 + (-0.771) = ?
Your answer is right; I don't agree with what you called Eox. The anode is oxidized, yes, and that is an oxidation, yes. But the potential for that electrode is -0.771. The reduction potential is 0.771; the oxidn potential is -0.771.