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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.
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.
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