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Aqueous Solutions

Posted: Sun Jan 13, 2019 5:52 pm
by Isabelle Fontanilla 1I
Why are aqueous solutions used when determining the equilibrium constants, while liquids are not?

Re: Aqueous Solutions

Posted: Sun Jan 13, 2019 6:01 pm
by Henry Krasner 1C
Pure solids and liquids aren't used when calculating the equilibrium constant because they don't affect the reactant amount at equilibrium, so it is assumed to be at 1.

Re: Aqueous Solutions  [ENDORSED]

Posted: Sun Jan 13, 2019 6:23 pm
by mcredi
Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The density of a pure liquid or solid is the same, regardless of how much pure liquid or solid is present.