Final answer:
The relative concentration of reactants and products at equilibrium depends on the equilibrium constant (K). If K is large, the products dominate the equilibrium mixture; if K is small, the reactants dominate; and if K is equal to 1, the concentrations of reactants and products are equal.
Step-by-step explanation:
The relative concentration of reactants and products at equilibrium depends on the equilibrium constant (K). The value of K determines whether the ratio of products to reactants is large, small, or equal. If K is large, the products dominate the equilibrium mixture; if K is small, the reactants dominate; and if K is equal to 1, the concentrations of reactants and products are equal.