Question

If a sample of a certain solution is determined to have a H3O+ concentration of 2.14 × 10-8 moles/liter, what is its pH? Round off your answer to one decimal place.

Answer 1

In this question, we need to find the pH of a solution from a given concentration of H+ or H3O+, and in order to do that, we need to use the pH formula, which is:

pH = -log [2.14*10^-8]

pH = 7.7, which makes the solution slightly basic