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27 Nov 2019

I have been using as a rule that the anode compartment contains thespecies with smallest standard reduction potential, but thefollowing question that does not seem to work. Here is thequestion

What reactions take place at the cathode and the anode when each ofthe following is electrolyzed

(c) molten MnI2

The cathode
Mn(2+)+ 2e- -> Mn E(Standard)=-1.18V
The anode
2I- -> I2 + 2e- E=-.54V

How do we know what is Cathode and Anode in this case?

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Patrina Schowalter
Patrina SchowalterLv2
9 Jan 2019

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