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Including Inert Electrodes

Posted: Tue Mar 03, 2020 6:35 pm
by AKhanna_3H
When do we include these in a cell diagram?

Re: Including Inert Electrodes

Posted: Tue Mar 03, 2020 7:17 pm
by Tiffany Chao 2H
When you have ions (which are aqueous). We can't have an electrode that aqueous so we can use an inert metal solid such as platinum or graphite.
For example, if you have Fe 2+ and Fe, you can have Fe (s) to be the electrode. But if you have Fe 2+ and Fe 3+, you need platinum. There's no difference between using platinum or graphite.

Re: Including Inert Electrodes

Posted: Tue Mar 03, 2020 10:47 pm
by 205291012
Use inert electrodes when both the oxidized and reduced species are in the same solution. Also, use inert electrode when there are gas/ion reactions like in 6L.5 (c).