Which of These Statements Regarding PH Is Incorrect

Which of these statements regarding pH is incorrect ?

A) pH is based on the [H₃O⁺] in solution.
B) If [H₃O⁺] = 1.0 × 10 ^{− 4} M, the solution is acidic.
C) If pH = 7.0, the solution is neutral.
D) If pH
E) Pure water has [H₃O⁺] = 1.0 × 10^-7 M.