Equilibrium Constant (K):This is a number that expresses the relationship between the amounts of products and reactants present at equilibrium in a chemical reaction.
Reaction Quotient (Q):This is similar to K but for any point in time during the reaction, not just at equilibrium.
Le Chatelier's Principle: This principle predicts how changes in conditions (like temperature or pressure) will affect the position of equilibrium in a chemical system.