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FeO ₄²⁻ +2.0 v Fe ³⁺ 0.8 v Fe ²⁺ -0.5 v Fe ^0 In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of E _ FeO ₄²⁻ / Fe ²⁺ ^ O is

Options

  1. A2.1 V
  2. B1 .7 V
  3. C1 .4 V
  4. D1 .2 V

Correct answer

B. 1 .7 V

Step-by-step solution

aligned & G ₄^ o = G ₁^ o + G ₂^ o & - n ₄ FE ₄^ o =- n ₁ FE ₁^0- n ₂ FE ₂^ o & +4 E ₄^ o =3 2+(1 0.8) & E ₄^ o = 6.8 4 ~V & E ₄^ o =1.7 ~V aligned

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