March 29, 2024, 04:37:35 AM
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Topic: Do you include gases in the reactant quotient if you have aqueous things?  (Read 1884 times)

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Offline Sophia7X

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For example, if you were trying to calculate E cell, and the equation involved aqueous ions as well as gases, do you include the gas in Q? Or just the aqueous ions?
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Offline Borek

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For a hydrogen electrode potential is

$$E = \frac {RT} {2F} \ln \frac {[H^+]^2} {p_{H_2}}$$

Note that "standard" electrode requires exactly 1 atm of hydrogen pressure.
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