What is the ph of [H3O+] = 0.0010

To find the pH when given the concentration of H3O+, you can use the formula:

pH = -log[H3O+]

Given [H3O+] = 0.0010, you can plug this value into the formula:

pH = -log(0.0010)
pH = -log(1.0 x 10^-3)
pH = -(-3)
pH = 3

Therefore, the pH of a solution with [H3O+] = 0.0010 is 3.