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If I have a reaction with a reactant or product in an aqueous state, could I calculate Kp or only Kc? If I could calculate Kp, would I just exclude the aqueous reactant/product from the Kp calculation?
I think you only solve for Kp if the compounds in the given reaction are all gases, or if you are given the partial pressures (instead of concentrations) of every compound. Also, solids and liquids are the only states that are omitted from K calculations (Kc and Kp); thus the aqueous reactant/product would still be included in your work.
Remember that molar concentration of a pure substance (solid or liquid) does not change in a reaction, thus solids and liquids not included in K expression. So an aqueous solution should be calculated by Kc.
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