How to figure out Cathode and Anode Reactions?

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Jar-Yee 3L
Posts: 39
Joined: Fri Sep 25, 2015 3:00 am

How to figure out Cathode and Anode Reactions?

Postby Jar-Yee 3L » Thu Feb 04, 2016 10:25 pm

I realize that reduction occurs at cathodes, and oxidation occurs at the anodes.

However, given an entire, unbalanced redox reaction OR a combination of ions in solution, I find it difficult to figure out what equations to use.

For example, HW 14.15b:
The equation given is H+ (aq) + OH- (aq) --> H2O (l)

How on earth am I going to figure out what the oxidation and reduction reactions are?

Is there a certain way to go about these problems, mainly ALL of the parts in number 15, so we can figure out the chemical equations? This is killing me. Help

Andre Tsivis 1K
Posts: 16
Joined: Fri Sep 25, 2015 3:00 am

Re: How to figure out Cathode and Anode Reactions?

Postby Andre Tsivis 1K » Fri Feb 05, 2016 12:45 am

Oxidation occurs when a substance loses an electron. Therefore the charge increases. Reduction occurs where a substance gains an electron and reduces a substance's chemical charge. The half reactions show oxidation and reduction separately, both balanced seperately so that all of the e- cancel out on both sides.


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