1. Dynamic Equilibrium

2. Quantitative vs. Reversible
So far we have studied quantitative reactions, reactions which proceed until the limiting reactant is consumed
However, many reactions are not quantitative, they are reversible meaning they can proceed in both forward and reverse directions

3. Dynamic Equilibrium
When the rate of the forward reaction and the reverse reaction are balanced, the system is in dynamic equilibrium
This does NOT mean that nothing is happening!

4. Properties of Equilibrium Systems
Macroscopic properties (e.g. colour, pressure, concentration, pH) are constant. I.e. It appears as if nothing is changing
Closed systems
Forward rate = Reverse rate
Can be establish from either direction

5. Practice!
P. 428 #1-5