Anode and Cathode
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Anode and Cathode
How can you tell which solution is the anode and which solution is the cathode? How do you know which way the electrons are flowing?
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Re: Anode and Cathode
I believe it's based on the E value for the half reactions. The more negative half reaction is the anode and the more positive half reaction is the cathode.
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Re: Anode and Cathode
Oxidation occurs at the anode and reduction at the cathode. You can also look at the standard potentials to determine which one will be which. Galvanic cells only work with positive standard cell potentials.
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Re: Anode and Cathode
the more negative half reaction is the anode and the more positive half reaction is the cathode.
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Re: Anode and Cathode
The more positive electronic potential will be at the reduction reaction, which will be in the cathode
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Re: Anode and Cathode
Electrons are always flowing from the anode to the cathode. You can tell which substances are at the anode by determining which substance is losing electrons. The opposite goes for the cathode. In a cell diagram (written), the substances on the left of the double lines are the ones at the anode.
Re: Anode and Cathode
The anode loses electrons (undergoes oxidation) and the cathode gains electrons (undergoes reduction).
Re: Anode and Cathode
The anode is where there is a loss of electrons and the compound is oxidized. The cathode is where there is a gain of electrons and the compound is reduced. You can tell which is more likely by looking at the Eo values. the more negative one is a stronger reducing agent and is therefore more likely oxidized.
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Re: Anode and Cathode
Electrons are lost from the anode (which is where oxidation occurs) and travel to the cathode (where reduction occurs).
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Re: Anode and Cathode
Also, for cell diagrams, the cathode will be depicted on the right, even if the cell reaction is not spontaneous in that direction.
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