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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: wytw on January 16, 2016, 11:05:49 AM

Title: Redox potential
Post by: wytw on January 16, 2016, 11:05:49 AM

Hello everyone,

I wonder how I can measure the redox potential of Fe²⁺/Fe³⁺ in a mixture of acetonitrile/DMSO.
I need Pt wire, voltmeter and ref electrode but which reference should I use in organic solvents ?
Is a salt bridge necessary ?

Thank you for your help ! :)

Title: Re: Redox potential
Post by: billnotgatez on January 16, 2016, 12:16:05 PM

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Title: Re: Redox potential
Post by: wytw on January 16, 2016, 04:10:56 PM

Of course, I'm sorry !

About the electrode I found the "non-aqueous Silver/Silver Ion (Ag/Ag⁺)" but is that common or do you have others suggestions ?

In my solution I have water/toluene/acetonitrile and iron salt (but there is a great homogenization with acetonitrile) so I wonder, which is the "real potential" of Fe²⁺ / Fe³⁺ in my case considering that I have 2 phases at the end ?
Because the iron salt is in both phases so I don't think I can only consider one phase...

Thank you !