14.13 c

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Cam Bear 2F
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Joined: Thu Jul 27, 2017 3:01 am

14.13 c

Postby Cam Bear 2F » Mon Feb 19, 2018 6:49 pm

Cl2(g) + H2(g)--> HCl (aq)
I don't really understand how they got the cell diagram that's in the solutions manual. They put Pt(s)|H2(g)|H+(aq)||Cl-(aq)|Cl2(g)|Pt(s). I'm confused about the cathode side of the diagram. Why is Cl-(aq) before Cl2(g)? Also, I'm still a little bit unsure how you tell when Pt is needed and when its not. Thanks!

Wayland Leung
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Joined: Sat Jul 22, 2017 3:00 am
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Re: 14.13 c

Postby Wayland Leung » Mon Feb 19, 2018 7:02 pm

Platinum is added when there is no metal or electrode, it is used because it is chemically inert and rarely reacts. The Cl(aq) is separated because there is a phase change between it and Cl2(g).

Cam Bear 2F
Posts: 60
Joined: Thu Jul 27, 2017 3:01 am

Re: 14.13 c

Postby Cam Bear 2F » Mon Feb 19, 2018 10:26 pm

Okay thanks! I understand why the line is between them. I just thought it went cathode(reactant)|cathode(product) so I was wondering if anyone could explain why Cl-(aq) is before Cl2(g)?


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