Question

What is the pH of a solution that contains 0.1 M HCl (hydrochloric acid)? The acid dissociation constant (Ka) of HCl is 1.3 x 10^-6.

Answer 1

HCl is a strong acid, which means it dissociates completely in water. Therefore, the concentration of H+ ions in the solution will be equal to the concentration of HCl. [H+] = 0.1 MTo find the pH of the solution, use the pH formula:pH = -log10[H+]pH = -log10 0.1 pH = 1The pH of the 0.1 M HCl solution is 1.