## Pt(s) use

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

Abigail Sanders 1E
Posts: 112
Joined: Wed Sep 11, 2019 12:16 am

### Pt(s) use

Can anyone explain which cell diagrams/reactions include Pt(s) as an inert electrode vs when it is incorrect to include it in the cell diagram? Also, what are the other types of electrodes that can be used and when are these used?

Michael Nguyen 1E
Posts: 120
Joined: Sat Aug 17, 2019 12:17 am

### Re: Pt(s) use

A platinum electrode is needed when there is no solid metal conductor as an electrode already present. If there are already a metal anode and a metal cathode, then the platinum electrode is unnecessary. Whenever an inert electrode is needed, it is usually the platinum electrode, and I am unsure if there are other suitable ones.

Kristina Rizo 2K
Posts: 105
Joined: Wed Sep 18, 2019 12:19 am

### Re: Pt(s) use

Michael Nguyen 1E wrote:A platinum electrode is needed when there is no solid metal conductor as an electrode already present. If there are already a metal anode and a metal cathode, then the platinum electrode is unnecessary. Whenever an inert electrode is needed, it is usually the platinum electrode, and I am unsure if there are other suitable ones.

Graphite is another acceptable inert electrode.

Kayli Choy 2F
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Joined: Sat Aug 24, 2019 12:17 am

### Re: Pt(s) use

If you have a half-reaction and both the products and reactants are aqueous, then you would need a platinum electrode.

Abby Soriano 1J
Posts: 103
Joined: Sat Aug 24, 2019 12:16 am

### Re: Pt(s) use

If there is not already a conducting solid present in the reaction, then an inert conductor (like platinum) can be used as an electrode to transfer electrons between the half-reactions of the cell.

Altamash Mahsud 1I
Posts: 50
Joined: Fri Aug 09, 2019 12:16 am

### Re: Pt(s) use

A platinum electrode is used when the reaction that is being studied in the cell does not have a metal that can conduct electricity and transfer the electrons from one side of the cell to the other. You would not need the platinum electrode when you have a reaction taking place that has the metal electrode take part in the reaction (for example: when solid copper metal is being oxidized to create copper ions in solution ----> in this case the electrode being used is the copper metal, which transfers the electrons from the oxidation reaction of the copper to the other side of the cell.)

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