Cathode vs Anode

Moderators: Chem_Mod, Chem_Admin

Jessica Jones 2B
Posts: 80
Joined: Fri Sep 29, 2017 7:04 am

Cathode vs Anode

Postby Jessica Jones 2B » Wed Feb 21, 2018 8:38 pm

When doing a galvanic cell, how do you know which direction to put the oxidizing and reducing agents? Meaning if the reducing agent was Fe3+ to Fe. Would we write Fe3+|Fe or Fe|Fe3+ ?

Christy Lee 2H
Posts: 73
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 1 time

Re: Cathode vs Anode

Postby Christy Lee 2H » Wed Feb 21, 2018 9:24 pm

As long as solids are on the outsides, it does not matter.

Minie 1G
Posts: 63
Joined: Fri Sep 29, 2017 7:04 am

Re: Cathode vs Anode

Postby Minie 1G » Thu Feb 22, 2018 12:40 am

I think by convention you put the anode first, because then when you read it from left to right your eyes follow the flow of electrons from anode to cathode. So, oxidation (anode) -> reduction (cathode) site.

Christine Wastila 1H
Posts: 61
Joined: Fri Sep 29, 2017 7:04 am

Re: Cathode vs Anode

Postby Christine Wastila 1H » Thu Feb 22, 2018 1:17 pm

The anode is on the left and the cathode is on the right. Solids are always on the outside (add Pt if none) and aqueous are closest to the salt bridge (I don’t think order matters if there are multiple).

Abby Ellstrom 1I
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

Re: Cathode vs Anode

Postby Abby Ellstrom 1I » Thu Feb 22, 2018 2:38 pm

You put solids on the outside and aqueous solutions on the inside.


Return to “Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams”

Who is online

Users browsing this forum: No registered users and 1 guest