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Chris Tai 1B
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Joined: Sat Aug 24, 2019 12:16 am


Postby Chris Tai 1B » Mon Mar 02, 2020 1:15 pm

Under what circumstances should I include platinum in the cell diagram? When do I know it's on the side of the anode or on the side of the cathode, or both?

Parker Smith
Posts: 102
Joined: Thu Jul 25, 2019 12:15 am

Re: Platinum

Postby Parker Smith » Mon Mar 02, 2020 2:14 pm

Platinum is a noble metal, meaning it is inert in electrochemical conducting. It can be used as both a cathode and an anode. We use platinum anodes/cathodes when the solution involves an aqueous product or reactant, or both in some cases. For example, a platinum conductor would be used for the half reaction Iron(III) +1e- --> Iron(II), since Iron (III) and Iron(II) are both aqueous cations.

Venus_Hagan 2L
Posts: 104
Joined: Fri Aug 02, 2019 12:16 am

Re: Platinum

Postby Venus_Hagan 2L » Mon Mar 02, 2020 4:19 pm

We use metals like platinum in our galvanic cells when both the reactants and products of a half-reaction are not in a solid-state. For the example of a hydrogen cathode, the H+ ions(aq) are getting reduced into H2 gas. Without a platinum electrode, the electrons can not flow from the anode and get to the H+ and reduce it.

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