Equilibria of Other Reaction Classes



The properties and rules of chemical equilibria apply to other reaction classes. Dissolution and precipitation and acid-base reactions are examples of systems in equilibrium. A solution becomes saturated once the rate that the solute dissolves becomes equal to the rate that it reforms a precipitate; at that rate the concentration of dissolved solute cannot increase. Because saturated solutions are in equilibrium, the concentration of dissolved solute and undissolved solid can be changed by applying stress to the system, thus shifting the equilibrium to one side or the other, according to Le Chatelier's principle. When a solution contains more than one equilibrium relationship, the concentrations of dissolved solute, and therefore the solubility of the solutes, can be affected or changed.

At A Glance