Cell Diagram/Ecell


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jlinwashington1B
Posts: 65
Joined: Fri Sep 28, 2018 12:22 am

Cell Diagram/Ecell

Postby jlinwashington1B » Mon Mar 11, 2019 5:26 pm

how do we determine which is the anode and which is the cathode?

2c_britneyly
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: Cell Diagram/Ecell

Postby 2c_britneyly » Mon Mar 11, 2019 5:42 pm

If you're told the cell does work, cell potential should always be positive. You flip the reduction half reactions and go with whatever gives you the higher voltage.
However, if you're not told the cell does work and given a cell diagram, the anode (the species being oxidized) is on the left, and the cathode (the speicies being reduced) is on the right.
Last edited by 2c_britneyly on Mon Mar 11, 2019 6:10 pm, edited 1 time in total.

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

Re: Cell Diagram/Ecell

Postby ChathuriGunasekera1D » Mon Mar 11, 2019 5:43 pm

The anode is the one that gets oxidized (loses electrons) and the cathode is the one that gets reduced (gains electrons)

David Sarkissian 1K
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am
Been upvoted: 1 time

Re: Cell Diagram/Ecell

Postby David Sarkissian 1K » Mon Mar 11, 2019 5:49 pm

Is there a difference between what is being oxidized/reduced and the oxidizing/reducing agent? I always get confused when I see one or the other in problems. In actuality do oxidizing agents get reduced and reducing agents get oxidized?

Jayasuriya Senthilvelan 4I
Posts: 31
Joined: Thu Jan 10, 2019 12:17 am

Re: Cell Diagram/Ecell

Postby Jayasuriya Senthilvelan 4I » Mon Mar 11, 2019 5:55 pm

Anode side is the one that gets oxidized. Cathode side is the one that gets reduced. In a galvanic cell, the E nought cell should be positive, so flip your half reactions such that the sum of the E values gives you a positive value. If both flipped combinations of the reactions give you a positive E nought cell, then the one with the higher E is the correct one.

Mark 1D
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Cell Diagram/Ecell

Postby Mark 1D » Mon Mar 11, 2019 7:53 pm

cathode gains electrons(reduction) whilst the anode loses electrons (oxidation)

jocelyntzeng
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Cell Diagram/Ecell

Postby jocelyntzeng » Sat Mar 16, 2019 12:50 pm

anode is oxidation and it is on the left whereas cathode is reduction and it is on the right

Ryan Troutman 4L
Posts: 68
Joined: Fri Sep 28, 2018 12:22 am

Re: Cell Diagram/Ecell

Postby Ryan Troutman 4L » Sat Mar 16, 2019 1:02 pm

From what everyone else has said, there's a few different tricks to remember which has which such as
RedCat (Reduction - Cathode)
and
AnOx (Oxidization - Anode)

Niveda_B_3I
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Cell Diagram/Ecell

Postby Niveda_B_3I » Sat Mar 16, 2019 1:05 pm

The anode is oxidized, loses electrons.
The cathode is reduced, gains electrons.


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