Sapling 17

[Aaron Akhavan-Dis1B]

What would the potential of a standard hydrogen electrode (S.H.E.) be under the given conditions?
[H+]=0.69 M PH2=1.1 atm T=298 K

Why/how can we divide the two concentrations if they are different units?

[Shanna Yu 1C]

Hi!

If you're wondering about the fact that we can use the value with pressure alongside the molarity, I believe it's because the Nernst equation includes the R value, a.k.a the universal gas constant. Someone can correct me if I'm wrong, though!

[Margia Adriano 2A]

Hi there! I believe that the above poster is correct, the Nernst equation does account for that in that it includes the ideal gas constant, which takes care of the difference in units!

[Kaihan_Danesh_2J]

You do not half the concentrations, you simply are able to solve the question by using half coefficients. So essentially the only thing that changes is the Q equation because of the different coefficients which change the power to which the concentrations are put.

edit: I read your question wrong, the above posters are right in their reasoning I believe, that the R value takes care of the units.