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Half Reactions

Posted: Sun Feb 23, 2020 3:22 pm
by Alison Trinh 1E
What is a "half reaction"?

Re: Half Reactions

Posted: Sun Feb 23, 2020 3:31 pm
by Dan M -3E
A "half reaction" is when you split up the redox reaction into the oxidation reaction and the reduction reaction. So, instead of the electrons being transferred from one atom/molecule to another, we can see just the way the electrons are changed in a single one of the reaction molecules.

Re: Half Reactions

Posted: Sun Feb 23, 2020 5:40 pm
by Anisha Chandra 1K
An example of some half reactions would be:

Zn(s) --> Zn2+(aq)
Cu2+(aq) --> Cu (s)

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:27 pm
by Anna Chen 1K
There are two half reactions in a redox reaction. Oxidation is the half reaction involving a loss of electrons; reduction is the half reaction involving a gain of electrons.

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:30 pm
by Charysa Santos 4G
A half reaction is either the reduction reaction (gaining electrons) or oxidation reaction (losing electrons) that make up your redox reaction.

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:43 pm
by PranaviKolla2B
Could someone explain how the reducing agent and the oxidizing agent relate to the half reactions of a redox reaction?

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:51 pm
by Angela Wu-2H
Anisha Chandra 1K wrote:An example of some half reactions would be:

Zn(s) --> Zn2+(aq)
Cu2+(aq) --> Cu (s)


So in these examples, which one is oxidizing and which one is reducing?

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:52 pm
by Timmy Nguyen Dis 1I
A half reaction is just one part of the redox reaction, it could be the reduction OR the oxidation of the species

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:53 pm
by Alice Chang 2H
Angela Wu-2H wrote:
Anisha Chandra 1K wrote:An example of some half reactions would be:

Zn(s) --> Zn2+(aq)
Cu2+(aq) --> Cu (s)


So in these examples, which one is oxidizing and which one is reducing?


Since Zn is becoming more positive, it is being oxidized (losing electrons).
Since Cu2+ becomes more negative, it is being reduced (gaining electrons).

Re: Half Reactions

Posted: Sun Feb 23, 2020 7:54 pm
by chari_maya 3B
I don't think the oxidizing/reducing agents are explicit in the half reactions, rather there is a focus on what gains/loses electrons.

Re: Half Reactions

Posted: Sun Feb 23, 2020 8:00 pm
by 305385703
A half reaction is a way of representing a certain part of a redox reaction. It shows just the process of either reduction or oxidation and the electrons that are involved.

Re: Half Reactions

Posted: Sun Feb 23, 2020 8:18 pm
by Lauren Stack 1C
A half reaction is used when trying to balance a redox reaction for our purposes. One of the half reaction shows the oxidation, while the other demonstrates the reduction. This equations allow you to keep track of the electrons being transferred in order to balance the equation properly.

Re: Half Reactions

Posted: Sun Feb 23, 2020 8:31 pm
by J_CHEN 4I
The "redox" in "redox reaction" is short for reduction-oxidation. The half-reaction of a reduction-oxidation reaction is the reduction reaction and the other half-reaction is the oxidation reaction.