Which statement is TRUE for a buffer solution?
It resists changes in pH when small amounts of acid or base are added is the scientifically accurate answer to this question. Within the study of Acid, Base, pH, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of It resists changes in pH when small amounts of acid or base are added directly address what is being asked. Among the other options, It neutralizes only acids, It neutralizes only bases, and It contains only weak acids do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2