14.13 (b)

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Andy Liao 1B
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Joined: Thu Jul 13, 2017 3:00 am

14.13 (b)

Postby Andy Liao 1B » Sat Feb 24, 2018 2:08 pm

Problem: 14.13 Write the half-reactions, the balanced equation for the
cell reaction, and the cell diagram for each of the following skeletal equations:
(b) Ce4+(aq) + I-(aq) -> I2(s) + Ce3+(aq)

I was wondering why Pt(s) is needed as an inert electrode on the anode side of the cell diagram even though a solid is present (I2(s)).To my understanding, inert electrodes are used when the solid form of an aqueous solution is not available. Can someone please explain?

Ju-Wei Wang 1I
Posts: 31
Joined: Fri Sep 29, 2017 7:05 am

Re: 14.13 (b)

Postby Ju-Wei Wang 1I » Sat Feb 24, 2018 2:26 pm

Platinum is needed because I2(s) isn't a metallic conductor. Just because there is the presence of a solid does not necessarily mean that it is the electrode.

Samantha Joseph 1F
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Re: 14.13 (b)

Postby Samantha Joseph 1F » Sat Feb 24, 2018 3:06 pm

And as long as it is a metal, you can use either a solid or liquid as the conductor.

Xin He 2L
Posts: 38
Joined: Fri Sep 29, 2017 7:05 am

Re: 14.13 (b)

Postby Xin He 2L » Sat Feb 24, 2018 3:12 pm

I2 isn't a conductor, so the platinum is still needed.

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