Question

Which of the following sentence best describes a buffer? A. A substance that resists small change in the acidity of a solution when an acid or base is added to the solution.
B. a chemical substance that prevents changes in hydrogen ion concentration.

Answer 1

In a solution, a buffer is a substance that releases and catches Hydrogen ions keeping the same pH. A buffer is resistible on pH change by taking Hydrogen ions whenever acids are being added to a solution. Whenever bases are added, it donates hydrogen ions. Therefore, the answer to this question is letter A.