Which of the following is a buffer system? A)NaCl(aq)and NaNO₃ (aq) B)HCl(aq)and NaOH(aq) C) H₂CO₃ (aq)and KHCO₃ (aq) D)NaCl(aq)and NaOH(aq) E) H₂O(l)and HCl(aq)

Question

Quizplus · Accepted Answer

The presence of both the weak acid (H₂COOH) and its conjugate base (KH₃COO-) in the form of a salt make this solution a buffer system. Buffer systems are solutions that resist changes in pH when small amounts of acid or base are added. The other choices either do not contain a weak acid and its conjugate base or do not have a balanced ratio of acid and base to act as a buffer system.

Which of the Following Is a Buffer System