I keep getting “pH scale” questions wrong in Equilibrium. What's the trap?
believing pH can't go below 0 or above 14.
The usual trap: believing pH can't go below 0 or above 14. How to avoid it: concentrated strong acids/bases really can give pH outside 0–14. Go back to the definition — pH = −log[H⁺]; below 7 is acidic, above 7 is basic, 7 is neutral at 25°C.
Key point
pH scale
Common mistake
believing pH can't go below 0 or above 14.
Memory tip
concentrated strong acids/bases really can give pH outside 0–14.
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