Enter electrons as e-. Use smallest possible integer coefficients for ALL reactions. If a box is not needed, leave it blank. A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge. Co2+(aq) + 2Cr2+(aq) -> Co(s) + 2Cr3+(aq) The anode reaction is: The cathode reaction is: In the external circuit, electrons migrate the Cr2+|Cr3+ electrode the Co|Co2+ electrode. In the salt bridge, anions migrate the Co|Co2+ compartment the Cr2+|Cr3+ compartment.
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