In the laboratory, a general chemistry student measured the pH of a 0.583M solution of HClO_3 to be 3.862.


What is the experimentally determined value of K_a for HClO_3?


A. 1.37 times 10^-4


B. 2.35 times 10^-4


C. 3.11 times 10^-7


D. 1.89 times 10^-8


E. 3.24 times 10^-8