the direction of a reaction by comparing Q and K.
relative magnitudes of the reaction quotient Q and the equilibrium
constant K indicate how the reaction mixture changes as it moves
toward equilibrium. If Q is
smaller than K, the reaction proceeds from left to right until Q
= K. When Q = K,
the reaction is at equilibrium and has no tendency to change. If Q is larger than K, the
reaction proceeds from right to left until Q = K.