The following cell was employed to determine [I-]

Cd(s)|Cd2+(0.100M)||I-(xM), I2(sat’d)|Pt(s).

Deteremine [I-] if the cell potential is +1.063 V. The standard potentials are:

Cd2+ + 2e- = Cd(s); E° = -0.403 V and I2 + 2e- = 2I-; E° = +0.5345 V.