Find the pH of a solution whose hydronium concentration is 1.0 x 10-12. Input your answer with no decimal places.

Answer 1

pH = -log 1x10^-12

pH = 12

This assumes you do not take into account the auto-ionization of water. If you are in an introductory course, this assumption is probably ok. Otherwise, you would have to add 1x10-7 M H⁺ to the value.