What does “pH scale” actually mean in Equilibrium, and why does it matter for JEE?
pH = −log[H⁺]; below 7 is acidic, above 7 is basic, 7 is neutral at 25°C.
In simple words: pH = −log[H⁺]; below 7 is acidic, above 7 is basic, 7 is neutral at 25°C. Getting pH scale clear matters because JEE questions on Equilibrium usually test this idea directly, not just a formula you memorised.
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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