solids and liquids in the rxn quotient

[Maggie Eberhardt - 2H]

When calculating Q, do we exclude solids and liquids as when we calculate K? (I'm mostly referring to problem two on the Pizza Rolls review packet)

[Alice Ma 2K]

Yes, we always exclude solids and liquids when calculating for Q or K.

[Michellekim1H]

We never include solvents/liquids and solids for K and Q. Only aq and g are accepted.

[gabbymaraziti]

Yes, liquids and solids are excluded from calculating K or Q.

[Noe BM 1J]

Yes, you exclude solids and liquids. You only take into account gases and aqueous solutions when calculating Q and/or K.

[John Liang 2I]

Yes. The reason being is that liquids and solids are always in excess/change is negligible in the reversible rxns, so their molarities would cancel out in the K equation anyways. hope this helps!

[SimranSangha4I]

Yes, exclude the two when calculating the Q or K.

[Chris Charton 1B]

Solids and Liquids have an activity level of 1, so even if you include them in the calculations they will have no effect on the results.

[Jainam Shah 4I]

Yes exclude the solids and liquids. They usually are in excess as they barely react and the concentration of liquids change very little making the change negligible.