Le Chatelier's Principle
This chemistry video tutorial provides a basic introduction into Le Chatelier's Principle of chemical equilibrium. It explains how to determine which direction the reaction will shift if the concentrations of the reactants or the products increase in value. It also explains the effect of a catalyst and an inert noble gas on the position of equilibrium. Other effects include pressure, temperature (endothermic and exothermic reactions), volume, adding water, and changes in the pH of the solution.