Question

What is the pH of a solution with an [H+] concentration of 0.000091 M? Give your answer to 2 decimal places, number only (e.g. 3.44) Explain your process and how you got your answer.

Answer 1

In order to find the pH of a solution with a given concentration of H+, we can simply use the pH formula, which is:

pH = -log [H+]

pH = -log [9.1 * 10^-5], this calculation is better if you use a calculator

pH = 4.04