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Posted: Sun Jan 13, 2019 5:52 pm
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
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
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.