Chemical reactions do not always moderate changes in conceptration of an active component

It is shown in this paper that the use of Le Chatelier"s principle as a Principle of Moderation fails. It is discussed moderation of mole fractions and moderation of molar concentration (molarity) in a reaction of ideal gases. An analysis carried out on thermodynamic grounds allows us to conclude that this system moderates the increment of molar concentration (molarity) of an active component, but this same system does not moderate the increment of mole fraction of an active component at constant T and V.