The pH of a solution is 5.00. Which of the following is TRUE about the solution?
A) Its [H3O+] is 1.0 × 10^-9 M
B) Its [H3O+] is 1.0 × 10^-5 M
C) Its [H3O+] is 1.0 × 10^5 M
D) It is more acidic than a solution whose pH is 4.00.
E) none of the above
Answer: B