Equilibrium Redox Equations and Calculating their standard cell potentials

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Mason_Aguila_2G
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Joined: Wed Sep 21, 2016 2:59 pm

Equilibrium Redox Equations and Calculating their standard cell potentials

Postby Mason_Aguila_2G » Fri Feb 10, 2017 3:43 pm

I am having trouble understanding how to balance the equilibrium redox equations, especially in problem 14.15. How do I determine the half reactions for oxidation and reduction?

Sangita_Sub_3H
Posts: 23
Joined: Sat Jul 09, 2016 3:00 am

Re: Equilibrium Redox Equations and Calculating their standard cell potentials

Postby Sangita_Sub_3H » Fri Feb 10, 2017 4:01 pm

Hi! Okay so for part a of this problem you have the equation AgBr(s) -->Ag(+) + Br-(aq). So in this case you have the two half reactions of Ag(s) --> Ag(+) +e- and Br + e- -->Br-(aq). You can see that Ag is being oxidized and Br is being reduced based on the reaction either losing or gaining electrons. So in a galvanic cell, you would write the cathode first, or the oxidized reaction, and then the anode, or the reduced reaction, separated by a salt bridge. So it would be written as Ag|Ag(+)||Br|Br-.

Hope this helps!


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