Which liquids to use

[Adam Kramer 1A]

Dr. Lavelle earlier mentioned that we never use liquids or solids in calculating the K or Q values, but in the last lecture I remember him mentioning a few times that we would use the concentration of the liquid or something like that... Can someone explain why he was saying that we find that liquid concentration now?

[Ashley Fang 2G]

We never use pure solids (s) or liquids (l) in calculating equilibrium, but we do use gaseous (g) and aqueous (aq) substances. Maybe he was referring to the liquid concentration in the aqueous substance.

[Marni Kahn 1A]

I think that you were getting confused with aqueous solutions, which are included in K calculations

[Sam McNeill 1E]

Pure liquids are never used, since there cannot be a concentration of a pure liquid.

[Ashley Tran 2I]

To add on, we don't include a pure liquid in an equilibrium calculation because it acts as the solvent in a chemical reaction and its change in concentration is relatively insignificant so in the K expression, the product concentration and reactant concentration would just cancel out.

[Abigail_Hagen2G]

For solving equilibrium constants, you usually just use aqueous compounds or gaseous ones

[Minh Ngo 4G]

Only use aqueous and gas for K. You probably misunderstood aqueous for liquid.

[nicole-2B]

To add on, we don't include a pure liquid in an equilibrium calculation because it acts as the solvent in a chemical reaction and its change in concentration is relatively insignificant so in the K expression, the product concentration and reactant concentration would just cancel out.

Thanks for explaining the reason why!!