Question

Describe how to use Le Chatelier’s principle to predict the possible ways a chemical system can respond to changes.

Answer 1

For  ED you can put what happens to the equilibrium when common ions are added  or you can put what happens to the equilibrium when the concentration of the reactants increases or decreases

Answer 2

Le Chatelier's principle simply explains how equilibria change as you change the conditions of a reaction. If you have a reaction that is at equilibrium lets say (A + 2B <--> C + D) by removing C or D we can drive the reaction forward and products more products. I can provide a more in-depth description if needed.