EQUILIBRIUM EXPRESSION (noun)

 

The equation obtained by multiplying the concentrations of the products and dividing by the multiplied reactant concentrations.

Example: for the chemical reaction A + 2B C + D, the equilibrium expression is ([A][B]²)/([C][D]). If A=0.5, B=2, C=1, and D=3, then the equilibrium constant (K) = 0.667.