Equilibrium 2: The Equilibrium Expression

* Frozen webcam video for last ~2 minutes (audio and "whiteboard" work continues).* This video takes the concepts of reversibility and equilibrium and applies it to the gazillions of molecules of reactants and products that are present in any given sample. We introduce the concept of the equilibrium constant (Keq), which is a constant (at a given temperature) for a given chemical reaction. Expert Note: Because our course focuses on primarily solution-phase reactions, we do not cover Kp (pressure-based equilibrium constants) or the conversion between Kc and Kp. Nor do we bother with the concept of activities; chemistry majors will be exposed to that concept in our analytical course.