What is the pH of a 0.020 M HClO4 solution (strong acid)?Group of answer choices12.300.0200.0401.70

The pH of a solution is determined by the concentration of hydrogen ions [H+] in the solution. For strong acids like HClO4, they completely dissociate in water, meaning every molecule of HClO4 will produce one H+ ion.

Step 1: Write the dissociation equation for HClO4 in water: HClO4 -> H+ + ClO4-

Step 2: Determine the concentration of H+ ions. Since HClO4 is a strong acid and completely dissociates in water, the concentration of H+ ions is equal to the initial concentration of HClO4. So, [H+] = 0.020 M.

Step 3: Use the pH formula. pH = -log[H+].

Step 4: Substitute the value of [H+] into the formula. pH = -log(0.020) = 1.70.

So, the pH of a 0.020 M HClO4 solution is 1.70.