why do we not include the concentrations of solids or liquids in the equilibrium constant expression, k?
* do we only account for concentrations in the aqueous state?
K expression involving solids/liquids
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Re: K expression involving solids/liquids
We only use gases and aqueous solutions in K expressions. Solids don't have concentrations so they are not included and pure substances (liquids) will not react enough to make any effect so they are left out as well.
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Re: K expression involving solids/liquids
We don't include solids or liquids because, in the grand scheme of the reaction, only a negligible amount is used and therefore doesn't affect the equilibrium constant.
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Re: K expression involving solids/liquids
When writing the equilibrium constant expression we don't include solids and liquids because, as Dr. Lavelle said in class, the molar concentration of a pure substance doesn't change in a reaction and thus, does not need to be included.
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Re: K expression involving solids/liquids
To determine the equilibrium constant, only gases and aqueous solutions are used. Liquids and solids are not used because pure substances do not change in a reaction.
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Re: K expression involving solids/liquids
The concentration of liquids (solutes) and solids are not included in the calculation of the equilibrium constant because of the inability to apply this characteristic to these phenomena and have it possess and plausible meaning. Solutes, in a reaction at equilibrium, have an insignificant change in concentration, so it is safe to approximate the true value of K and leave out the solute. Solids are excluded because solids do not have a concentration fundamentally.
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Re: K expression involving solids/liquids
Solid and pure liquids cannot really react effectively with other substances and doesn't have a concentratio, therefore they are not included in the equilibrium constant equation.
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Re: K expression involving solids/liquids
Pure substances do not have concentrations and do not impact equilibrium constants because they have no concentration that changes in the reaction
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