Anode and Cathode

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805383532
Posts: 53
Joined: Thu Jul 11, 2019 12:16 am

Anode and Cathode

Postby 805383532 » Sun Mar 01, 2020 4:55 pm

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?

Nicholas Chin 1G
Posts: 100
Joined: Thu Jul 11, 2019 12:17 am

Re: Anode and Cathode

Postby Nicholas Chin 1G » Sun Mar 01, 2020 5:44 pm

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.

Rosa Munoz 2E
Posts: 105
Joined: Wed Sep 18, 2019 12:21 am

Re: Anode and Cathode

Postby Rosa Munoz 2E » Sun Mar 01, 2020 6:07 pm

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.

Owen-Koetters-4I
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Joined: Fri Sep 28, 2018 12:16 am

Re: Anode and Cathode

Postby Owen-Koetters-4I » Sun Mar 01, 2020 6:24 pm

the more negative half reaction is the anode and the more positive half reaction is the cathode.

Abigail_Hagen2G
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

Re: Anode and Cathode

Postby Abigail_Hagen2G » Sun Mar 01, 2020 6:32 pm

The more positive electronic potential will be at the reduction reaction, which will be in the cathode

MeeraBhagat
Posts: 95
Joined: Sat Aug 24, 2019 12:15 am

Re: Anode and Cathode

Postby MeeraBhagat » Sun Mar 01, 2020 9:37 pm

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.

Noe BM 1J
Posts: 50
Joined: Sat Sep 07, 2019 12:17 am

Re: Anode and Cathode

Postby Noe BM 1J » Sun Mar 01, 2020 10:32 pm

The anode loses electrons (undergoes oxidation) and the cathode gains electrons (undergoes reduction).

805422680
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Anode and Cathode

Postby 805422680 » Sun Mar 01, 2020 10:34 pm

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.

preyasikumar_2L
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Anode and Cathode

Postby preyasikumar_2L » Sun Mar 01, 2020 11:59 pm

Electrons are lost from the anode (which is where oxidation occurs) and travel to the cathode (where reduction occurs).

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Anode and Cathode

Postby kristi le 2F » Mon Mar 02, 2020 12:55 am

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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