Question

What is the pH of a 2.2 M solution of HClO4?

Answer 1

The pH of a 2.2 M solution of HClO4 is 2.2 because it is a strong acid that fully ionizes in solution.

Step-by-step explanation:

The pH of a solution is a measure of its acidity or basicity. It represents the concentration of hydrogen ions (H+) in the solution. In the case of hydrochloric acid (HCl), it is a strong acid and fully ionizes in solution.

Therefore, a 2.2 M solution of HClO4 would also have a pH of 2.2. This is because the concentration of H+ ions in the solution is equal to the concentration of the acid.

Answer 2

Since HClO4 is a strong acid it will completely dissociate in solution.

HClO4 + H2O --> H3O+ + ClO4-

Therefore, your concentration of HClO4 will be equal to your amount of H3O+, the conjugate acid in solution.

The Ka expression is as follows:

Ka= [H3O+][ClO4-] / [HClO4]

So you know that -log [H3O+] gets you pH, so just plug in [2.2] as your concentration of H3O+ and your answer should be -.34 pH