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Homework Help: Calculating ECell of Anode-Half Cell? Chemistry Review

  1. Aug 8, 2014 #1
    1. The problem statement, all variables and given/known data
    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)

    2. Relevant equations
    I think ECEll= ECathode-EAnode

    but not sure

    3. The attempt at a solution

    have no idea
  2. jcsd
  3. Aug 10, 2014 #2
    Voltage is calculated in reduction potentials. Which entity is being reduced and which is being oxidized? If the reduction potential of one entity is a positive number, what is the sign of the contribution to voltage if the entity is being oxidized?
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