Pt (s)  [ENDORSED]

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Mia Navarro 1D
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Joined: Fri Sep 29, 2017 7:04 am

Pt (s)

Postby Mia Navarro 1D » Sat Feb 10, 2018 7:37 pm

When do you know to put Pt(s) on only one side or both sides of the || for the cell diagram?

Chem_Mod
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Re: Pt (s)

Postby Chem_Mod » Sat Feb 10, 2018 7:56 pm

Pt(s) is needed as an electrode when the half-reaction has no conducting solids.

Cyianna 2F
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Re: Pt (s)

Postby Cyianna 2F » Sun Feb 11, 2018 3:10 pm

If not stated, then it is assumed that Pt(s) is the metal used for both the anode and cathode.

Katherine Jordak 1H
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Joined: Fri Sep 29, 2017 7:05 am

Re: Pt (s)

Postby Katherine Jordak 1H » Thu Feb 15, 2018 2:55 am

In problem 13 c, they say an inert electrode such as Pt. Does that mean other elements can be used? Will we need to know/recognize those other elements?

Chem_Mod
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Re: Pt (s)  [ENDORSED]

Postby Chem_Mod » Thu Feb 15, 2018 7:11 am

Pt and graphite are the two most common inert electrodes. We will accept both.

Cost (graphite is much cheaper) and application (manufacturing preference) often determine which is used.

Graphite is more brittle than Pt and not as chemically stable as Pt.

However graphite is lighter and therefore good for small and portable batteries.

I don't typically go into this much detail in class but great to see student interest and many good questions.


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