How to find if a cell is anode or cathode from the given equation?
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Ecell=Ecathode-Eanode
When we see two ions/ elements without an chemical equation, can we determine which element is a the anode and which is at the cathode by looking at their standard E? The one with the higher E is the better oxidizing agent (reduced) so it is in the cathode, and the one with a lower E is the better reducing agent (oxidized)so it is in the anode? (assume it's a Galvanic Cell, so since E>0 in Galvanic cell, cathode must be the one with higher E value)
When we see two ions/ elements without an chemical equation, can we determine which element is a the anode and which is at the cathode by looking at their standard E? The one with the higher E is the better oxidizing agent (reduced) so it is in the cathode, and the one with a lower E is the better reducing agent (oxidized)so it is in the anode? (assume it's a Galvanic Cell, so since E>0 in Galvanic cell, cathode must be the one with higher E value)
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Using this equation:
Ecell=Ecathode-Eanode..
You should first assume one is the cathode and the other is the anode. Then you can calculate the theoretical emf - if the emf > 0, then that reaction will be spontaneous and it means you got the right cathode and right anode. If the calculated emf < 0, it means that that reaction is not spontaneous, which means that the reverse reaction is spontaneous; that happens if you exchange the cathode and anode..
Ecell=Ecathode-Eanode..
You should first assume one is the cathode and the other is the anode. Then you can calculate the theoretical emf - if the emf > 0, then that reaction will be spontaneous and it means you got the right cathode and right anode. If the calculated emf < 0, it means that that reaction is not spontaneous, which means that the reverse reaction is spontaneous; that happens if you exchange the cathode and anode..
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