I keep getting “Le Chatelier's principle” questions wrong in Equilibrium. What's the trap?
predicting the wrong direction of shift.
The usual trap: predicting the wrong direction of shift. How to avoid it: add a reactant → shifts right; increase pressure → shifts to fewer gas moles. Go back to the definition — if you disturb a system at equilibrium, it shifts to oppose the change.
Key point
Le Chatelier's principle
Common mistake
predicting the wrong direction of shift.
Memory tip
add a reactant → shifts right; increase pressure → shifts to fewer gas moles.
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