14.11d  [ENDORSED]

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Grace Ramey 2K
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Postby Grace Ramey 2K » Tue Feb 20, 2018 5:16 pm

For this question, on the right side of the salt bridge in the cell diagram (the cathode), the order of compounds is
II OH- (aq) I O2 (g)

I was under the impression that the compounds are listed "reactant I product" in cell diagrams. Yet, in the solutions manual, the balanced equation for the cathode half reaction is written with OH- on the right and O2 on the left. Can someone explain why this problem is an exception, or if I am thinking about this incorrectly?

Thank you for your help!

Rakhi Ratanjee 1D
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Joined: Fri Sep 29, 2017 7:04 am

Re: 14.11d

Postby Rakhi Ratanjee 1D » Tue Feb 20, 2018 7:05 pm

How do you determine if a reaction is acidic or basic?

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Re: 14.11d  [ENDORSED]

Postby Chem_Mod » Wed Feb 21, 2018 11:34 am

For cell diagram, within each half part, electrode and solids are written far away from the salt bridge, followed by liquid, gas and aqueous solution. Within each phase, orders are not strictly defined, but people tend to put in the order of reactant to product.

If the reaction decreases the amount of OH or increase H, then it’s acidic. Basic is vice versa. If you have a specific example you would like explained, feel free to list it!

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