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A voltaic cell is constructed in which the anode is a Mg|Mg^2+ half cell and the cathode is a Zn|Zn^2+ half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Use the pull-down boxes 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 Mg|Mg2+ electrode ____ the Zn|Zn^2+ electrode. In the salt bridge, anions migrate ____ the Mg|Mg2+ compartment ____ the Zn|Zn^2+ compartment.