Oxidation versus reduction

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Matt Sanruk 2H
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Oxidation versus reduction

Postby Matt Sanruk 2H » Mon Feb 24, 2020 12:02 am

If you were given a diagram of the electrochemical cell, should I assume that anode is on the left and the cathode is on the right?

SnehinRajkumar1L
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Joined: Thu Jul 11, 2019 12:15 am

Re: Oxidation versus reduction

Postby SnehinRajkumar1L » Mon Feb 24, 2020 12:08 am

Yes, that is the convention when representing galvanic cells.

Matt Sanruk 2H
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Re: Oxidation versus reduction

Postby Matt Sanruk 2H » Mon Feb 24, 2020 12:10 am

Would there be a condition where the anode is on the right?

Alice Ma 2K
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Re: Oxidation versus reduction

Postby Alice Ma 2K » Mon Feb 24, 2020 12:15 am

The anode is always the one that is oxidized and the cathode is reduced, so if you know which species are oxidized or reduced, you can differentiate between the anode and the cathode.

Matt Sanruk 2H
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Re: Oxidation versus reduction

Postby Matt Sanruk 2H » Mon Feb 24, 2020 12:26 am

Alice Ma 2K wrote:The anode is always the one that is oxidized and the cathode is reduced, so if you know which species are oxidized or reduced, you can differentiate between the anode and the cathode.


Would you know this by an equation given or the electron flow?

Alice Ma 2K
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Re: Oxidation versus reduction

Postby Alice Ma 2K » Mon Feb 24, 2020 12:28 am

Matt Sanruk 2H wrote:
Alice Ma 2K wrote:The anode is always the one that is oxidized and the cathode is reduced, so if you know which species are oxidized or reduced, you can differentiate between the anode and the cathode.


Would you know this by an equation given or the electron flow?


Given a chemical equation, you can determine what species is oxidized or reduced by looking at the oxidation number or the species themselves. Given electron flow, we know that oxidized species lose electrons and reduced ones gain them, so the electrons would flow from the oxidized ones to the reduced ones.

J Medina 2I
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Re: Oxidation versus reduction

Postby J Medina 2I » Mon Feb 24, 2020 12:58 am

Conventionally it is shown flowing left from right where the left is the anion (anode) and the right is the cation (cathode).

EMurphy_2L
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Re: Oxidation versus reduction

Postby EMurphy_2L » Mon Feb 24, 2020 1:04 am

anode is left and cathode is right unless otherwise stated !

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

Re: Oxidation versus reduction

Postby Matt Sanruk 2H » Mon Feb 24, 2020 1:13 am

EMurphy_2L wrote:anode is left and cathode is right unless otherwise stated !


Ok, so he would not try and trick us in that way basically?

Michelle Song 1I
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Re: Oxidation versus reduction

Postby Michelle Song 1I » Mon Feb 24, 2020 5:34 am

Yeah you can pretty much assume anion is left and cathode is right unless the question is worded in a way that implies differently.


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