A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge.
I2(s) + Cd(s) = 2I-(aq) + Cd2+(aq)
The anode reaction is:
The cathode reaction is:
In the external circuit, electrons migrate (from/to) the Cd|Cd2+ electrode (from/to) the I-|I2 electrode.
In the salt bridge, anions migrate (from/to) the Cd|Cd2+ compartment (from/to) the I-|I2 compartment.