At equilibrium, the concentrations of reactants and products are related in a mathematical formula that produces a constant value. Consult the text, p.439-448 and p.463-464.
Homework: p.445 #5, 6; p.449 #3, 4, 8, 9; p.465 #1, 2
Homework: p.445 #5, 6; p.449 #3, 4, 8, 9; p.465 #1, 2