1. A voltaic electrochemical cell is constructed using the following reaction. The half-cell
components are separated by a salt bridge. Write the reactions that take place at the anode and at
the cathode, the direction in which the electrons migrate in the external circuit, and the direction
the anions in the salt bridge migrate. Use smallest possible integer coefficients. If a box is not
needed, leave it blank. Enter the reaction that takes place at the anode. Include state symbols:
Enter the reaction that takes place at the cathode. Include state symbols: In the external circuit,
electrons migrate the F2 electrodethe Pb electrode. Anions migrate the salt bridge -_ B the Pb
compartment. ??
Solution
Anode reaction :
Pb (s) ------------> Pb 2+
(aq.) + 2 e -
Cathode reaction:
F 2 (g) + 2 e -
-----------> 2 F -
(aq.)
In the external circuit, electrons migrate to F 2 from Pb
Anions migrate from salt bridge to Pb compartment.