Aqueous Solutions  [ENDORSED]

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Isabelle Fontanilla 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Aqueous Solutions

Postby Isabelle Fontanilla 1I » Sun Jan 13, 2019 5:52 pm

Why are aqueous solutions used when determining the equilibrium constants, while liquids are not?

Henry Krasner 1C
Posts: 64
Joined: Fri Sep 28, 2018 12:15 am

Re: Aqueous Solutions

Postby Henry Krasner 1C » 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.

mcredi
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Re: Aqueous Solutions  [ENDORSED]

Postby mcredi » 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.


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