for each of the equilibrium systems in this lab: ♦ write one (and only one) balanced chemical equation for the equilibrium system that is being studied. be sure to note what is observable (e.g. color, precipitate...). ♦ describe the stress(es) on the equilibrium, and the response(s) of the system to the stress(es) based on your observations (e.g. color change, amount of precipitate...). ♦ explain why the system responded as it did using lechatlier’s principle. be sure to include a balanced chemical equation for any secondary reaction which may have happened.