Sketch the galvanic cells based on the following overall reactions. Show the direction of electron flow, the direction of ion migration through the salt bridge, and identify the cathode and anode. Give the overall balanced equation. Assume that all concentrations are 10 M and that all partial pressures are 1.0 atm. b. Cl2(g) + Fe 2+ (aq) --> Fe 3+ (aq) + 2Cl-(aq)