Half reactions

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ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

Half reactions

Postby ng1D » Sun Feb 16, 2020 5:09 pm

In lecture, a redox reaction was separated into half reactions. What are half reactions and how are they separated?

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

Re: Half reactions

Postby Rory Simpson 2F » Sun Feb 16, 2020 5:12 pm

Half reactions separate the oxidation and the reduction reactions that occur in a redox reaction. You can use it to find out which elements are oxidized and reduced, and also balance redox reactions (since the number of electrons transferred should cancel out in the two half reactions combined.

KarineKim2L
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

Re: Half reactions

Postby KarineKim2L » Sun Feb 16, 2020 5:12 pm

One half reaction is the oxidation reaction, and one half reaction is the reduction reaction. Whatever is losing electrons would be in the oxidation reaction, and whatever is gaining electrons would be in the reduction reaction.

ng1D
Posts: 43
Joined: Wed Sep 18, 2019 12:17 am

Re: Half reactions

Postby ng1D » Sun Feb 16, 2020 6:18 pm

When balancing redox reactions, are we balancing the number of atoms or electrons?

Juliet Stephenson 4E
Posts: 100
Joined: Wed Sep 18, 2019 12:21 am

Re: Half reactions

Postby Juliet Stephenson 4E » Sun Feb 16, 2020 6:29 pm

ng1D wrote:When balancing redox reactions, are we balancing the number of atoms or electrons?

Both!

Mariana Fuentes 1L
Posts: 43
Joined: Wed Nov 15, 2017 3:00 am

Re: Half reactions

Postby Mariana Fuentes 1L » Sun Feb 16, 2020 6:43 pm

A way of identifying redox reactions is : The LEO goes GER.

LEO: Lose Electrons Oxidation

GER: Gain Electrons Reduction

Sreyes_1C
Posts: 90
Joined: Fri Sep 28, 2018 12:19 am

Re: Half reactions

Postby Sreyes_1C » Sun Feb 23, 2020 7:17 pm

Mariana Fuentes 1L wrote:A way of identifying redox reactions is : The LEO goes GER.

LEO: Lose Electrons Oxidation

GER: Gain Electrons Reduction



there's also OIL RIG, which is:
Oxidation Is Loss= OIL
Reduction Is Gain= RIG

which is referring to loss/gain of electrons

Anna Chen 1K
Posts: 104
Joined: Thu Jul 25, 2019 12:18 am

Re: Half reactions

Postby Anna Chen 1K » Sun Feb 23, 2020 7:20 pm

Half reactions are the two reactions involved in a redox reaction, oxidation and reduction. Oxidation is the reaction involving a loss of electrons; reduction is the reaction involving a gain of electrons.


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