flipping equations

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Ghadir Seder 1G
Posts: 134
Joined: Sat Sep 14, 2019 12:17 am

flipping equations

Postby Ghadir Seder 1G » Sat Mar 14, 2020 9:03 pm

How do you know which equation to flip so that the electrons cancel out? Is it the reduction or oxidation equation that you flip?

chimerila
Posts: 53
Joined: Wed Nov 14, 2018 12:23 am

Re: flipping equations

Postby chimerila » Sat Mar 14, 2020 9:04 pm

I'm still kind of confused on that too. I just know that to cancel the electrons out, make sure whatever you end up flipping, you're reduction equation has electrons on the left, and the oxidized equation has electrons on the right

Kimberly Koo 2I
Posts: 99
Joined: Sat Aug 17, 2019 12:17 am

Re: flipping equations

Postby Kimberly Koo 2I » Sat Mar 14, 2020 9:06 pm

This would depend on the situation given, but generally, you would want to manipulate the equations so that you end up with the standard potential of the cell being positive (the reaction is spontaneous). Use the equation E(cell)=E(electrode on right of cell diagram)-E(electrode on left of cell diagram)

vpena_1I
Posts: 109
Joined: Sat Aug 24, 2019 12:15 am

Re: flipping equations

Postby vpena_1I » Sat Mar 14, 2020 9:06 pm

If I'm understanding your question correctly, you would flip the oxidation one, so that your electrons are on the right side of the equation, and on your left for the reduction half reaction.

Chris Charton 1B
Posts: 69
Joined: Mon Jun 17, 2019 7:23 am

Re: flipping equations

Postby Chris Charton 1B » Sat Mar 14, 2020 9:21 pm

The E(cell) has to be positive, so the cathode will always be the larger (more positive) reduction potential value, and the anode will then "be flipped" so that it is giving off an electron (oxidized).

Micah3J
Posts: 100
Joined: Tue Oct 08, 2019 12:16 am

Re: flipping equations

Postby Micah3J » Sat Mar 14, 2020 9:37 pm

What are you guys referring to as "flipping"? Does this mean making one side negative or like looking at the reverse reaction instead?

SMIYAZAKI_1B
Posts: 63
Joined: Sat Aug 24, 2019 12:15 am

Re: flipping equations

Postby SMIYAZAKI_1B » Sat Mar 14, 2020 9:41 pm

The wording is definitely a little difficult to understand but I am also assuming that you are asking us for which redox hzlf equation to switch the product and reactant sides. I would say that generally, you would want to have the cell potential to be positive in order to allow the system to have spontaneous reaction.

905373636
Posts: 62
Joined: Thu Aug 01, 2019 12:15 am

Re: flipping equations

Postby 905373636 » Sat Mar 14, 2020 10:03 pm

This is all based on the equation that Ecell = Eright - Eleft and as Eleft is the oxidation cell, you 'flip' the oxidation cell.


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