half reaction

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Vanessa Rojas 4F
Posts: 15
Joined: Wed Feb 20, 2019 12:17 am

half reaction

Postby Vanessa Rojas 4F » Sat Feb 15, 2020 10:27 pm

What is a half reaction?

Ronak Naik
Posts: 103
Joined: Sat Jul 20, 2019 12:15 am

Re: half reaction

Postby Ronak Naik » Sat Feb 15, 2020 10:30 pm

A half-reaction is a partial breakdown of a full chemical redox reaction that shows each individual species being oxidized (loss of electrons, electrons on the product side) or being reduced (gain of electrons, electrons on the reactant side).

BritneyP- 2c
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Joined: Sat Sep 14, 2019 12:15 am

Re: half reaction

Postby BritneyP- 2c » Sat Feb 15, 2020 10:55 pm

A half reaction is when a chemical equation is broken up into 2 pieces. One is the substance that is oxidized, and the other is the one that is reduced. When you add both together, they should add up to the original equation.

preyasikumar_2L
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Joined: Fri Aug 09, 2019 12:17 am

Re: half reaction

Postby preyasikumar_2L » Sun Feb 16, 2020 1:03 am

A half reaction is either of the reduction (RED) or oxidation (OX) reaction components of a redox reaction.

Rodrigo2J
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Joined: Sat Jul 20, 2019 12:16 am

Re: half reaction

Postby Rodrigo2J » Sun Feb 16, 2020 1:03 am

Based on what we did in class, I would say that a half reaction is split into an oxidation reaction and a reduction reaction. If you combine both reactions you should end up with the original reaction.

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Re: half reaction

Postby DLee_1L » Sun Feb 16, 2020 1:48 am

Rodrigo2J wrote:Based on what we did in class, I would say that a half reaction is split into an oxidation reaction and a reduction reaction. If you combine both reactions you should end up with the original reaction.

From the example in class, is there a reason why the oxidation reaction only had the Fe giving off electrons and the reduction reaction including hydrogen and water?

505316964
Posts: 95
Joined: Thu Jul 11, 2019 12:17 am

Re: half reaction

Postby 505316964 » Sun Feb 16, 2020 12:56 pm

When writing half reactons why is the number of electrons written in the equation being added?

For example in this oxidation:
5Fe = Fe3+ + 5e-

Why is the 5e- added and not subtracted?

Maia_Jackson_2C
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: half reaction

Postby Maia_Jackson_2C » Sun Feb 16, 2020 1:54 pm

505316964 wrote:When writing half reactons why is the number of electrons written in the equation being added?

For example in this oxidation:
5Fe = Fe3+ + 5e-

Why is the 5e- added and not subtracted?


I think this is because the net number of electrons cannot change, since the reaction is balanced and no new electrons are being added or subtracted.

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: half reaction

Postby gabbymaraziti » Sun Feb 16, 2020 1:58 pm

A half reaction is when a redox reaction is broken up into the reduction or oxidation components.


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