If the pH of a solution is decreased from 9 to 8, it means that the
A) concentration of H+ has decreased to one-tenth (1/10) what it was at pH 9.
B) concentration of H+ has increased 10-fold (10X) compared to what it was at pH 9.
C) concentration of OH- has increased 10-fold (10X) compared to what it was at pH 9.
D) concentration of OH- has decreased to one-tenth (1/10) what it was at pH 9.
E) Both B and D are correct.
Answer: E) Both B and D are correct.