Figuring out n


Moderators: Chem_Mod, Chem_Admin

Aiden Metzner 2C
Posts: 104
Joined: Wed Sep 18, 2019 12:21 am

Figuring out n

Postby Aiden Metzner 2C » Wed Mar 04, 2020 12:17 pm

When using the equation G= -nFe how do we determine what n is?

Tai Metzger 3K
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am

Re: Figuring out n

Postby Tai Metzger 3K » Wed Mar 04, 2020 12:40 pm

n is the number of electrons transferred per reaction.

For example, in the reaction: Fe2+ + Cu --> Cu2+ + Fe n would equal 2.

I hope this helps!

Brianna Becerra 1B
Posts: 117
Joined: Fri Aug 02, 2019 12:16 am

Re: Figuring out n

Postby Brianna Becerra 1B » Wed Mar 04, 2020 12:42 pm

n refers to the number of electrons being transferred which can be determined by looking at the balanced half-reactions and seeing how many electrons were added to either side of the equation. Make sure that the number of electrons in both half-reactions are equal to each other!

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

Re: Figuring out n

Postby 905373636 » Wed Mar 04, 2020 1:54 pm

n is the mols of electrons transferred! Make sure not to find a common multiple, then, for example if for a reduction 2 electrons are transferred whereas for an oxidation 3 electrons are transferred -> common multiple 6 when balancing equations and 6 electrons are transferred; (n=6).

Hui Qiao Wu 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

Re: Figuring out n

Postby Hui Qiao Wu 1I » Wed Mar 04, 2020 3:29 pm

Write out half rxns
Balance half rxns
Combine the two half rxns (when combining the two rxns, you should be canceling out electrons. The number of electrons, do not add up the number of electrons from both rxns, is your n).

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Re: Figuring out n

Postby Ying Yan 1F » Fri Mar 06, 2020 10:26 pm

You would have to balance the redox half reaction to determine what n is, since n is the number of electrons needed to balance the redox reactions. Hope this helps!

205405339
Posts: 77
Joined: Thu Jul 11, 2019 12:16 am

Re: Figuring out n

Postby 205405339 » Fri Mar 06, 2020 11:48 pm

n is the moles of electrons transferred so use the number of electrons found in the half reaction with the most electrons

805383532
Posts: 53
Joined: Thu Jul 11, 2019 12:16 am

Re: Figuring out n

Postby 805383532 » Sun Mar 08, 2020 8:21 pm

In this equation, n is equal to the number of electrons being transferred, so you would first have to balance the half reactions.

Cavalli_1H
Posts: 92
Joined: Thu Sep 19, 2019 12:15 am

Re: Figuring out n

Postby Cavalli_1H » Sun Mar 08, 2020 8:22 pm

it is essentially the difference in moles between to sides of a reaction or the net transfer of moles

J_CHEN 4I
Posts: 54
Joined: Tue Nov 14, 2017 3:01 am

Re: Figuring out n

Postby J_CHEN 4I » Sun Mar 08, 2020 8:30 pm

n is the number of electrons transferred in the reaction. Unless the number of e- transferred are clear from the reaction, you can always find the number of e- by balancing the half-reactions.

Veronica Lu 2H
Posts: 89
Joined: Wed Sep 18, 2019 12:18 am
Been upvoted: 1 time

Re: Figuring out n

Postby Veronica Lu 2H » Sun Mar 08, 2020 8:46 pm

n is the number of electrons that are transferred

KHowe_1D
Posts: 103
Joined: Thu Jul 25, 2019 12:15 am
Been upvoted: 1 time

Re: Figuring out n

Postby KHowe_1D » Sun Mar 08, 2020 9:05 pm

n is the number of electrons transferred in a reaction.

AronCainBayot2K
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: Figuring out n

Postby AronCainBayot2K » Sun Mar 08, 2020 9:15 pm

n is determined by the amount of electrons transferred in the reactions, easier to find in half-reactions.

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Figuring out n

Postby Bryce Barbee » Sun Mar 08, 2020 9:16 pm

n is the moles of electrons so you need to balance out the redox reaction in order to see how many electrons are being transferred.

kendal mccarthy
Posts: 109
Joined: Wed Nov 14, 2018 12:22 am

Re: Figuring out n

Postby kendal mccarthy » Sun Mar 08, 2020 11:27 pm

You balance the redox reactions, and the least common denominator of electrons transfered on the product and reactant side is equivilant to n.

Ryan_K_1K
Posts: 51
Joined: Wed Nov 14, 2018 12:18 am

Re: Figuring out n

Postby Ryan_K_1K » Sun Mar 08, 2020 11:28 pm

n is the number of electrons needed to balance the reaction


Return to “Work, Gibbs Free Energy, Cell (Redox) Potentials”

Who is online

Users browsing this forum: No registered users and 1 guest