Solids and Liquids

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Kathleen Vidanes 1E
Posts: 62
Joined: Fri Sep 29, 2017 7:07 am

Solids and Liquids

Postby Kathleen Vidanes 1E » Sun Nov 26, 2017 11:39 pm

I am having trouble understanding the reason as to why solids and liquids are not included in the K expression when solving for the equilibrium constant. Can someone please explain this in detail? Thank you.

Kevin Ru 1D
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Solids and Liquids

Postby Kevin Ru 1D » Sun Nov 26, 2017 11:48 pm

Solids and liquids are not included in the K expression because their concentrations stay constant throughout the reaction. Therefore, they do not affect the reactant amount at equilibrium in the reaction. Hope that helps!

Madeline Musselman 3H
Posts: 25
Joined: Fri Sep 29, 2017 7:07 am

Re: Solids and Liquids

Postby Madeline Musselman 3H » Mon Nov 27, 2017 1:27 pm

Solids and liquids are not included in the K constant because they do not affect the reactant amount at equilibrium. Therefore, they are disregarded and kept at a value of 1.

Chem_Mod
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Re: Solids and Liquids

Postby Chem_Mod » Mon Nov 27, 2017 2:07 pm

Kevin Ru 1C wrote:their concentrations stay constant throughout the reaction.

Their concentrations do change, however the amount they change is negligible in comparison to how abundant they were to begin, so we ignore them. Imagine taking $10 from a billionaire.


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