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Homework Answers
At anode: half reaction.
Cr+2(aq) ----> Cr+3(aq) + 1e-
At cathode : half reaction.
Ni+2(aq) + 2e- -----> Ni(s)
Net cell reaction:
2 Cr+2(aq) + Ni+2(aq) -----> 2 Cr+3(aq) + Ni(s)
In the external circuit electrons migrate to the Ni/Ni+2 electrode from the Cr+2/Cr+3 electrode.
In the salt bridge, anions migrate to the Cr+2/Cr+3 compartment to the Ni/Ni+2 compartment.
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