The Redox Reaction of Peroxydisulfate with Iodide Has Been Used $\to$

question 15

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?
S₂O₈^2-(aq) + 2H⁺ + 2I^-(aq) $\to$ 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 is correct.