Ex. Q:Do you think you can make a working battery if you have the following things available: a silver wire, a solution of AgNO3 of unit activity, a solution of zinc sulfate with unit activity, and a zinc electrode (you also have a salt bridge and everything else you will need)? What is the standard electrical potential? What would be the overall reaction of this battery? Which will be the cathode and which will be the anode?
- Yes! You can make a Galvanic cell like this:(−)Zn(s)|ZnSO4(aq, 1M)||AgNO3(aq, 1M)|Ag(s)(+).
- 0.800 − (−0.762) = 1.562 V.
- 2 Ag+ + Zn → 2 Ag + Zn2+.
- Ag will be the cathode and Zn will be the anode.