If a stress is applied to a reaction mixture at equilibrium, net reaction occurs in the direction that releives the stress.
A system at equilibruim will respond to an applied stress in a direction which relieves the effect of that stress.
Change in pressure
Change in concentration
Change in temperature
if exothermic, Kc decreases and reaction goes left
if endothermic, Kc increases and reaction goes right
Catalysts decrease Ea by an equal factor for both the forward and reverse reactions.
Composition of the equilibirum mixture remains constant.
a substance that dissociated in water to produce H+
ex. HCl > Cl2 + H+
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