A voltaic cell is constructed in which the anode is a MgMg2+ half cell and the cathode is a MnMnn2+ half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: ++ The cathode reaction is: The net cell reaction is: ++ In the external circuit, electrons migrate the MnMn2+ electrode the MgMg2+ electrode. In the salt bridge, anions migrate the MnMn2+ compartment the MgMg2+ compartment. A voltaic cell is constructed in which the anode is a MnMn2+ half cell and the cathode is a Cu+Cu2+ half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: The cathode reaction is: The net cell reaction is: In the external circuit, electrons migrate the MnMn2+ electrode the Cu+Cu2+ electrode. . In the salt bridge, anions migrate the MnMn2+ compartment the Cu+Cu2+compartment