2. The pH of a lime is 1.90. What is the [H3O+]?
To find the concentration of H3O+ ions in a solution with a pH of 1.90, you can use the formula:
pH = -log[H3O+]
First, convert the pH to a concentration of H3O+ ions:
pH = 1.90
[H3O+] = 10^(-pH)
[H3O+] = 10^(-1.90)
[H3O+] = 0.012589
Therefore, the concentration of H3O+ ions in a solution with a pH of 1.90 is 0.012589 M.