Answer
In a static equilibrium, there is no change in the system. All phases are static.
At the same time, in a dynamic equilibrium, there is some movement on the system, but the net change is zero.
A chemical equilibrium represents the dynamic equilibrium, since there is a rate of production of products and reactants, but they are exactly the same, so there is no net change.
Work Step by Step
You can see these definitions in the text, and mix the knowledge with the informations on section 17-1 about chemical equilibrium.
