Chemistry - the Complete Course Series, teaches students quantitative reasoning to solve chemistry problems. The 30 volume series covers all aspects of Chemistry from density to the mole, to molarity, stoichiometry and equilibrium. It demonstrates how to ask meaningful questions and conduct careful investigations to build knowledge of chemical and physical concepts and develop the skills to solve mathematical and scientific problems. Once a good understanding of the basic nature of equilibria is achieved, it is possible to tackle the solving of equilibrium problems. In this video several equilibrium problems are presented and solved. This volume teaches that all types of equilibrium problems involve applying the very same principles. In principle, the only essential thing that must be understood in order to work any equilibrium problem is how to write and interpret the meaning of an equilibrium constant. When solving equilibrium problems one must be very careful to distinguish initial concentrations from equilibrium concentrations.