Calculating ECell of Anode-Half Cell? Chemistry Review

[Blockmeister]

Homework Statement

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)

Homework Equations

I think ECEll= ECathode-EAnode

but not sure

The Attempt at a Solution

have no idea

 

[Teemo]

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?