Cell diagram

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Celine Hoh 2L
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Joined: Fri Sep 28, 2018 12:28 am

Cell diagram

Postby Celine Hoh 2L » Wed Feb 27, 2019 3:14 pm

In some of the HW problem solutions, the cell diagram shows Fe2+, Fe3+ II ..., instead of Fe2+ I Fe3+ II...
Is there a difference between using , and I ?

Posts: 31
Joined: Fri Sep 28, 2018 12:22 am

Re: Cell diagram

Postby Felicia1E » Wed Feb 27, 2019 3:36 pm

Yes, by using a comma you are denoting that the two species are in the same phase, for example Fe3+ (aq), Fe2+ (aq). However, if they are in different phases, say you need to put in a conducting solid like Pt, you would denote it as Fe3+ (aq), Fe2+ (aq) I Pt(s). Different phases are separated by the I, and same phases are separated by a comma.

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