CHEMISTRY COMMUNITY

This is a problem from the video modules Chemcial Equilibrium Part 1B. The question is are solvents included in equilibrium constant expressions? But, what are solvents? Is this because solvents are usually liquids but I thought they could be also solids and gases.

usually yes it's a liquid or aqueous solution

The solvent is the material that contains the solute and concentration change in the solvent is assumed to be negligible, so it is not included in the chemical equilibrium expressions

The solvent is what dissolves the solute. It is usually a liquid in this class. The universal solvent is water. However, it can also be a gas or supercritical fluid. The solvent can not be aqueous as an aqueous solution means that the solvent was water.