Le Chatelier’s Principle

Define the following terms:
a. Chemical equilibrium
b. Le Chatelier’s principle
Write chemical equations that describe the three equilibria that you will observe during this experiment.
Consider the hypothetical exothermic equilibrium reaction:
A + B ↔ C + D + heat
Which direction will the equilibrium shift under each of the following conditions:
a. Either A or B is added to the equilibrium system: _
b. Either A or B is removed from the equilibrium system: _
c. Either C or D is added to the equilibrium system: _
d. The equilibrium system is heated: _
e. The equilibrium system is cooled: __
What safety precautions need to be observed during this experiment?