CHEMICAL EQUILIBRIUM

Under constant temperature, the concentrations of products and the concentrations reactants do not affect the value of Kc. The value of Kc is only affected by temperature.

2011-08-23 00:06:38 補充：
A(g) + B(g) ⇌ C(g) + D(g)

Kc = [C][D]/[A][B]

Under constant temperature, Kc is constant. When the concentration of any component is changed, the equilibrium position will shift to maintain Kc to be constant.

if you consider not concentration but activity...