Finding K: liquids and aqueous

[Abigail Menchaca_1H]

Why do we keep aqueous solutions in the concentration equations and not liquids?

[Hussain Chharawalla 1G]

Aqueous solutions have a defined concentration. For example 10 moles of salt in one liter of aqueous solution is 10M concentration. However, a liquid by itself cannot be measured in concentration. If you had just water, you would not be able to write it in terms of a concentration.

[Emil Velasco 1H]

While liquids do not have a defined concentration (molarity), aqueous solutions do.

[005324438]

Liquids are pure substances and therefor cannot have a concentration. To have a concentration there needs to be a solute in a solvent, 2 substances, liquids are only 1 substance.

[Althea Zhao 1B]

Liquids don't change, so they cancel out.

[chari_maya 3B]

Is this the same case for solids?

[405268063]

Yes, this is the same case for solids. Their concentrations do not change.

[AGaeta_2C]

To clarify,
solids are not included in the K expression because they don't necessarily have a "concentration," and liquids are not included because they consist of a pure substance?

Is this thinking correct?