Chemistry / Chem 1780 · Atom · ~20 seconds
Le Châtelier's Principle as a Q-vs-K Consequence
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State
Le Châtelier's principle: a stress makes Q no longer equal K, and the system then reacts in whichever direction restores that equality.
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Adding reactant drops Q below K, so the reaction runs forward until Q climbs back to meet K.
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"Stress shifts equilibrium" is not an explanation; the shift happens because the stress moved Q away from K.