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Daniela Shatzki 2E wrote:if two are given you can't use the formula Ecell = Ecathode - Eanode and then decide which is which based on which arrangement will give you a positive overall value.
Does this work all the time?
If the standard cell potential is given then you will know the half reaction is an anode if it is more negative than the half reaction of the cathode. In other words, the more positive Ecell is the cathode and the more negative Ecell is the anode.
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