Question

"The [H3O+] of a solution with pH=2 is

A. 10 M.
B. -10 M.
C. 1×10^2 M.
D. 1×10^-2 M.
E. 1×10-^12 M."

Answer 1

The [H3O+] of a solution with pH=2 is 1×10^-2 M.

Step-by-step explanation:

The pH value of a solution is a measure of its acidity or basicity. The pH scale ranges from 0 to 14, with pH values below 7 considered acidic, pH values of 7 considered neutral, and pH values above 7 considered basic. The formula to calculate pH is given by pH = -log[H3O+].

In this case, the solution has a pH of 2. Therefore, the [H3O+] of the solution is 1×10^-2 M, which corresponds to option D.