Question

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. The pH lowers slightly but is approximately unchanged, and still remains acidic. What can you say about the solution? a. It is a buffer solution. b. It is not a buffer solution It is a strong acid solution. d. The solution has been neutralized. e. The solution has excess acid present

Answer 1

The solution on this question must be a buffer solution.

Step-by-step explanation

Buffer solution has a molecule that able to withstand pH changes when a small amount of strong acid is added. In the solution, there is conjugate base that could react with H+. When a strong acid is added, the reaction shifts to the left so the conjugate eats up a bit H+ resulting in a lower amount of expected pH changes.