The maximum acidity in water will occur at a pH of
- A0Correct
- B2
- C7
- D14
Solution
Concept
Lower pH means more H+ ions, so more acidity. Among the options, pH 0 is the most acidic.
Formula
pH = -log10[H^+]
Step-by-step solution
1. pH = -log[H+]. 2. Lower pH means higher H+ concentration. 3. pH 7 is neutral and pH 14 is most alkaline. 4. Among the options, pH 0 is the most acidic.
Explanation
The pH scale normally runs from 0 to 14. Acidity increases as pH decreases. So maximum acidity is at pH 0.
Why the other options are wrong
B: pH 2 is acidic but less acidic than pH 0. C: pH 7 is neutral. D: pH 14 is maximum alkalinity.
Shortcut
Smallest pH = strongest acid.
Common mistake
Confusing pH 14 with maximum acidity.
Correct answer: A) 0