Aq to Aq or S to Aq (14.13d)  [ENDORSED]

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Arianna Ko 2E
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Aq to Aq or S to Aq (14.13d)

Postby Arianna Ko 2E » Wed Feb 27, 2019 10:19 am

The equation given is Au+(aq) -> Au(s) + Au3+ (aq)
The anode reaction is Au(s) -> Au3+(aq) + 3e- but why is the anode reaction not Au+(aq) -> Au3+ 2e-

Chem_Mod
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Re: Aq to Aq or S to Aq (14.13d)  [ENDORSED]

Postby Chem_Mod » Wed Feb 27, 2019 7:13 pm

In this case, you will need an electrode to conduct, so Ag(s) is used instead of the aqueous form.

Bianca Barcelo 4I
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Re: Aq to Aq or S to Aq (14.13d)

Postby Bianca Barcelo 4I » Wed Feb 27, 2019 7:33 pm

So you can use Au(s) -> Au3+ 3e- as a half-reaction, even though both of these species are on the product side?


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