Anode and cathode

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Deborah Cheng 1F
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Joined: Thu Jul 13, 2017 3:00 am

Anode and cathode

Postby Deborah Cheng 1F » Fri Feb 09, 2018 12:00 am

Is there a clear, visual way to identify the anode and cathode in a cell diagram without the labels?

Anna Okabe
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

Re: Anode and cathode

Postby Anna Okabe » Fri Feb 09, 2018 12:06 am

Generally the anode will be on the left and the cathode is on he right. Also, the anode will have a (-) and a cathode will have a (+).

Sara Sasaki 1K
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Re: Anode and cathode

Postby Sara Sasaki 1K » Fri Feb 09, 2018 1:19 am

Additionally, electrons always flow out of the anode and into the cathode

Sarkis Sislyan 1D
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Joined: Thu Jul 27, 2017 3:00 am

Re: Anode and cathode

Postby Sarkis Sislyan 1D » Fri Feb 09, 2018 10:16 am

The anode is the one that oxidizes and is usually on the left and cathode is the one that reduces and is usually on the right

Angela G 2K
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Re: Anode and cathode

Postby Angela G 2K » Fri Feb 09, 2018 11:11 am

In a galvanic cell, the anode is usually on the right and is the site of oxidation, and generally gets thinner over time as the metal electrode loses electrons and gives off metal ions. The cathode is on the left and is the site of reduction, and gets thicker over time as the metal ions gain electrons and turns into solid metal deposited on the electrode.

William Satyadi 2A
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Joined: Sat Jul 22, 2017 3:00 am

Re: Anode and cathode

Postby William Satyadi 2A » Fri Feb 09, 2018 12:00 pm

The anode side is the side that is oxidizes, meaning electrons are lost. The electrons move towards the cathode/reduced side.

AtreyiMitra2L
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Re: Anode and cathode

Postby AtreyiMitra2L » Fri Feb 09, 2018 2:08 pm

At the anode, oxidation is occuring. At the cathode, reduction is occuring. If you know these concepts and look at the diagram enough, you will be able to distinguish the two

William Xu Dis 1D
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Joined: Fri Sep 29, 2017 7:05 am

Re: Anode and cathode

Postby William Xu Dis 1D » Fri Feb 09, 2018 4:01 pm

There isn't really a visual way to tell unless if you can identify the solutions or the electrodes. For example, if you can identify that there is zinc on one side and copper on the other, you know that zinc is on the anode side and the side with copper is the cathode. Also, if you can see the electron flow, the side to which the electrons are moving to is the cathode.

Julie Steklof 1A
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Joined: Thu Jul 13, 2017 3:00 am

Re: Anode and cathode

Postby Julie Steklof 1A » Sat Feb 10, 2018 3:51 pm

Does the anode always have to be drawn on the left and cathode on the right? Or is it necessary to know the solutions in order to tell which cell is which?

RussellChin_3A
Posts: 42
Joined: Sat Jul 22, 2017 3:01 am

Re: Anode and cathode

Postby RussellChin_3A » Sat Feb 10, 2018 3:59 pm

drawing the anode of the left is the conventional way. So I guess if you draw your cell correctly and get the direction of the e- current correct (from anode to cathode) it shouldn't matter if you draw the anode on the left or right. By recognizing which half rxn is the oxidation half or the reduction half will make drawing the cell really easy, so its helpful to identify that first.


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