The blood contains many compounds that serve to buffer the pH of the fluid such as bicarbonate and phosphate ions. Which of the following most correctly defines the meaning of the term buffering?
A) a solution containing a large concentration of a base such that the pH will not change significantly when an acid is added
B) a solution containing a large concentration of an acid such that the pH will not change significantly when more acid is added
C) a solution or substance which resists changes in pH when small quantities of an acid or base are added to it
D) pH at which a molecule or solution is neutrally charged
E) pH at which an equivalent distribution of acid and conjugate base exists in solution
Correct Answer:
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