Calculate the pH of a 0.0019 M HNO3 solution.
pH = -log[H+] = -log(.0019)
Since HNO3 breaks into H+ and NO3- with a 1:1 ratio.
Also log is base 10.
To calculate the pH of a solution, you need to know the concentration of the acidic solution and the dissociation constant of the acid. In this case, we are given that the concentration of the solution is 0.0019 M HNO3.
HNO3 is a strong acid and completely dissociates in water. Its dissociation equation is:
HNO3 -> H+ + NO3-
Since HNO3 is a strong acid, the concentration of H+ ions in the solution is equal to the initial concentration of the acid.
So, in this case, the concentration of H+ ions is 0.0019 M.
The pH of a solution is calculated using the formula:
pH = -log[H+]
Substituting the concentration of H+ into the formula gives:
pH = -log(0.0019)
Using a scientific calculator, you can calculate the pH to be approximately 2.72.
So, the pH of a 0.0019 M HNO3 solution is approximately 2.72.