Writing Cell Diagram?

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Kevin Pham 2G
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Joined: Fri Jul 15, 2016 3:00 am

Writing Cell Diagram?

Postby Kevin Pham 2G » Sun Feb 05, 2017 7:56 pm

Does the order in which we write the reactants and products of the anode and cathode in the cell diagram matter?

Hao 1I
Posts: 26
Joined: Wed Sep 21, 2016 3:00 pm
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Re: Writing Cell Diagram?

Postby Hao 1I » Sun Feb 05, 2017 8:02 pm

If you reverse the cell diagram, say from Cathode||Anode and that for the cathode and anode, Products|Reactants, then you have to change the sign of cell potential.

Posts: 14
Joined: Fri Jul 22, 2016 3:00 am

Re: Writing Cell Diagram?

Postby chris2E » Thu Feb 09, 2017 11:16 pm

It's convention for the anode to be on the left and the cathode to be on the right, Anode||Cathode. If the cell diagram is given in a problem, or it asks you to construct a cell diagram, then you can assume that the diagram will follow this convention. This is particularly important when given a cell diagram and asked to write the oxidation half-reaction and reduction half-reaction because the species on each side of the salt bridge do not have to be listed in order of reactant to product. In this case, it would be important to determine whether the charges increase or decrease from reactant to product since convention lets you know which species should be oxidized and which should species should be reduced.

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