Question

QUESTION 8

Buffer solutions:

keep the pH of the solution constant even when small amounts of acid or base are added

resist changes in pH when small amounts of acid or base are added

are not used up in buffer reactions and can keep reacting to adjust the pH indefinitely

have no practical uses outside of laboratory conditions

Answer 1

Buffer solutions resist changes in pH when small amounts of acid or base are added. They protect other molecules from the effects of added acid or base and are critically important in biological systems.

Step-by-step explanation:

A buffer solution is one which resists changes in pH when small amounts of acid or base are added. Buffer solutions contain both a weak acid and its conjugate base, or a weak base and its conjugate acid. By maintaining a relatively constant pH, buffers protect other molecules in the solution from the effects of added acid or base. These solutions are critically important in biological systems and can be obtained commercially.

Answer 2

B

Step-by-step explanation:

I would go with B b/c C and D are wrong. The reason C is wrong is that buffers do get used up after a while so it wont be able to react indefinitely to maintain the pH and the reason D is wrong is that there are thousands of uses for buffer ranging from your own human body to thousands and thousands of things.

In my opinion, A is not necessarily wrong because buffer's job is to keep the pH of the solution relatively constant (up to some point), but I think B is still the best answer because it describes the actual function of buffer which is to resist pH.