Equilibrium Position
The particular set of concentrations at which a system settles, describing how far the reaction has proceeded.
Unit
mol/L
In depth
The equilibrium constant is fixed at a given temperature, but the equilibrium position can be shifted by changing concentration or pressure — many different compositions satisfy the same K. Only a temperature change alters K itself.
Examples in the real world
Adding more nitrogen to the Haber equilibrium shifts the position towards ammonia without changing K.