What does a buffer do? A. It resists a change in pH when H+ or OH is added to a solution.
B. It prevents a salt from forming in solution.
C. It prevents an acid-base reaction from happening.
D. It prevents an acid or base from being neutralized.

A

Explanation:

A buffer is an aqueous solution that resists changes in pH upon the addition of an acid or a base. Also, adding water to a buffer or allowing water to evaporate from the buffer does not change the pH of a buffer significantly.

Answer Buffers. Buffers are solutions that resist changes in pH, upon addition of small amounts of acid or base. The can do this because they contain an acidic component, HA, to neutralize OH- ions, and a basic component, A-, to neutralize H+ ions.: A buffer is an aqueous solution that resists changes in pH upon the addition of an acid or a base”. Also, adding water to a buffer or allowing water to evaporate from the buffer does not change the pH of a buffer significantly.