Cell diagram

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sarahtang4B
Posts: 132
Joined: Fri Sep 28, 2018 12:27 am

Cell diagram

Postby sarahtang4B » Wed Mar 13, 2019 11:38 am

On homework problem 6L7c, where did the KOH come from in the cell diagram, do we need to include it?

Jerome Mercado 2J
Posts: 60
Joined: Tue Nov 28, 2017 3:02 am

Re: Cell diagram

Postby Jerome Mercado 2J » Wed Mar 13, 2019 12:39 pm

An OH is needed to balance the missing OH ions on each substance. It would be on the Cathode side since after doing the balanced half reactions, OH on the reduction half would be canceled off since the oxidizing half has 2 OH. The reason it has to be KOH instead of OH since OH by itself is highly ionized and will try to form a bond immediately. Thus, K+ is a needed spectator ion.


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