The standard potential of the Ag Ag + redox couple is + 0.80 V and
the standard potential of the cell 2+ + Fe(s) Fe (aq) Ag (aq) Ag(s) is +
1.24 V. What is the standard potential of the 2+ Fe Fe redox couple?
(a) 2.04 V ; (b) – 0.44 V; (c) – 2.04 V ; (d) + 0.44 V ; (e) – 0.88
V. Correct answer: b.