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Do you include gases in the reactant quotient if you have aqueous things?
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Topic: Do you include gases in the reactant quotient if you have aqueous things? (Read 2022 times)
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Sophia7X
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Do you include gases in the reactant quotient if you have aqueous things?
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on:
March 20, 2012, 03:22:36 PM »
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?
Thanks.
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Borek
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Re: Do you include gases in the reactant quotient if you have aqueous things?
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March 20, 2012, 04:11:40 PM »
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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ChemBuddy
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Do you include gases in the reactant quotient if you have aqueous things?