| A | B |
|---|
| chemical equilibrium | A dynamic reaction system in which the concentrations of all reactants and products remain constant as a function of time. |
| law of mass action | A general description of the equilibrium condition; it defines the equilibrium constant expression. |
| equilibrium expression | The expression obtained by multiplying the product concentrations and dividing by the multiplied reactant concentrations, with each concentration raised to a power represented by the coefficient in the balanced equation. |
| equilibrium constant | The value obtained when equilibrium concentrations of the chemical species are substituted in the equilibrium expression. |
| Le Chatelier's principle | If a change is imposed on a system at equilibrium, the position of the equilibrium will shift ina direction that tends to reduce the effect of that change. |
| homogeneous equilibria | An equilibrium system where all reactants and products are in the same phase. |
| heterogeneous equilibria | An equilibrium involving reactants and/or products in more than one phase. |
| reation quotient Q | A quotient obtained by applying the law of mass action to initial concentrations rather than to equilibrium concentrations. |
| equilibrium position | A particular set of equilibrium concentrations. |
