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0 V 5 . 0 2 V 8 . 0 3 0 . 2 2 4 Fe Fe Fe FeO ⎯ ⎯ → ⎯ ⎯ ⎯ → ⎯ ⎯ ⎯ → ⎯ − + + + − In the above diagram, the standard electrode potentials are given in volts (over the arrow).The value of Θ + − 2 2 4 Fe / FeO E is

1. 1.7 V
2. 1.2 V
3. 2.1 V
4. 1.4 V

Correct answer: 1.7 V

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