Solids and Liquids in K Expression

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Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Solids and Liquids in K Expression

Postby Tiffany_Cacy_3D » Fri Jan 11, 2019 11:21 am

So if you have a chemical equation that you want to find the equilibrium constant for, you do not include solids or liquids at all? I understand that this means that you do not include them in the K equation but if they are a part of the reaction shouldn't they affect the equilibrium? I am just a little confused on why they are excluded and why they don't contribute to finding the equilibrium constant.

Olivia L 4E
Posts: 59
Joined: Fri Sep 28, 2018 12:23 am
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Re: Solids and Liquids in K Expression

Postby Olivia L 4E » Fri Jan 11, 2019 11:41 am

They are exclude because the equilibrium constant describes concentrations/partial pressures whereas solid has neither. Liquids have a concentration but act as a solvent so they aren't included. Aqueous solutions on the other hand, are the solute so they are included because they are a by-product.

Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Re: Solids and Liquids in K Expression

Postby Tiffany_Cacy_3D » Fri Jan 11, 2019 11:43 am

Thank you that is actually very helpful!


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