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I know that there are three different versions of the Nernst Equation, and I understand the derivations for each one. I was wondering, though, when you would use the one with ln vs when you would use the one with log. I also was wondering why in the example on page 53 of the course reader (the Concentration Cell with Ag), why did we use the equation which assumes that this reaction occurred at 25 degrees Celsius?
In lecture it was mentioned that the nernst equation with log instead of ln is used a lot when dealing with biological reactions because its better fitted to deal with pH (since pH calculations involve log base 10 and not ln). As for the example on page 53, since were solving for Ecell from Estandard, we use/assume the standard temp. of 25 degrees celsius. I think.
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