A voltaic cell is constructed in which the following cell reaction occurs. The h

Question

A voltaic cell is constructed in which the following cell reaction occurs. The half-cell compartments are connected by a salt bridge.

2Fe3+(aq) + Ni(s) --->2Fe2+(aq) + Ni2+(aq)

The anode reaction is: ____+_____--->____+____

The cathode reaction is: ___+____--->_____+____

In the external circuit, electrons migrate _____ (from, to) the Fe2+|Fe3+ electrode _____ (from, to) the Ni|Ni2+ electrode.

In the salt bridge, anions migrate _____ (from, to) the Fe2+|Fe3+ compartment _____ (from, to) the Ni|Ni2+ compartment.

Enter electrons as e-. Use smallest possible integer coefficients for ALL reactions. If a box is not needed, leave it blank.

Explanation / Answer

The anode reaction is : Ni (s) ---------------> Ni2+ (aq.) + 2 e-

The cathode reaction is: Fe3+ (aq.) + e- ---------------> Fe2+ (aq.)

In the external circuit eletrons migrate from anode to cathode, i.e Ni/Ni2+ electrode to Fe3+/Fe2+ electrode.

In the salt bridge, anions migrate from Fe2+/Fe3+ compartment ot Ni/Ni2+ compartment

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