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NEST2023ChemistryElectrochemistry

Consider the three electrodes Fe / Fe ²⁺, Fe / Fe ³⁺ , and Fe ²⁺ / Fe ³⁺ , for which the standard electrode (oxidation) potentials are: E₁^0, E₂^0 , and E₃^0 , respectively. The standard EMF of the cell, Fe / Fe ²⁺ | Fe ³⁺+ Fe , is E₄^0 . The correct expression(s) is (are):

Options

  1. AE₃^0= (3 E₂^0-2 E₁^0 )
  2. BE₃^0= (E₂^0-E₁^0 )
  3. CE₄^0= (2 E₁^0-3 E₂^0 )
  4. DE₄^0= (E₁^0-E₂^0 )

Correct answer

D. E₄^0= (E₁^0-E₂^0 )

Step-by-step solution

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