Solids and Liquids in Equilibrium

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Jennifer1E
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Solids and Liquids in Equilibrium

Postby Jennifer1E » Mon Jul 31, 2017 7:12 pm

Why are solids and liquids not included in the K expression/equilibrium constant?

Chem_Mod
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Re: Solids and Liquids in Equilibrium

Postby Chem_Mod » Mon Jul 31, 2017 7:36 pm

In class I discussed that we only include the concentration of species that have changed while the reaction reached equilibrium.

Since solids cannot have a 'concentration', and the concentration of a solvent (large excess) does not change during a reaction, we leave them out.

John Huang 1G
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Re: Solids and Liquids in Equilibrium

Postby John Huang 1G » Sun Nov 26, 2017 10:20 am

Adding on to Chem_Mod's explanation, we should remember to include the concentrations of aqueous species. We should not leave out aqueous species just because they are dissociated in a solvent liquid. Generally, remember the difference between liquids and aqueous solutions.


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