The Redox Reaction of Peroxydisulfate with Iodide Has Been Used

question 3

Multiple Choice

The redox reaction of peroxydisulfate with iodide has been used for many years as part of the iodine clock reaction which introduces students to kinetics. If E°_cell = 1.587 V and E° of the cathode half-cell is 0.536 V, what is E° of the anode half-cell? S₂O₈²⁻(aq) + 2H⁺ + 2I⁻(aq) → 2HSO₄⁻(aq) + I₂(aq)

• A)-1.051 V
• B)-2.123 V
• C)1.051 V
• D)2.123 V
• E)None of these choices are correct.

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