1. Equilibrium Constant (Keq)

2. Equilibrium Constant
An equilibrium does not mean that you have 50% of the reactants and 50% of the products. It could be any combination that adds up to 100%. It is the rates that are equal in an equilibrium.
The equilibrium constant is a number that describes the balance between reactants and products in a system at equilibrium
Equilibrium Constant (Keq) – product of concentrations divided by the product of the concentrations of reactants

3. Equilibrium Constant

4. Practice Problems

5. Calculating Equilibrium Constants
If Keq << 1
The reverse reaction is favored; forward reaction does not proceed very far
If Keq ≈ 1
Neither direction is favored; forward reaction proceeds about halfway
If Keq >> 1
The forward reaction is favored; forward reaction proceeds virtually to completion

6. Practice Problems

7. Practice Problems