Which of the following solutions is a good buffer system? A) a solution that is 0.10 mol L^-1 NaCl and 0.10 mol L^-1 HCl B) a solution that is 0.10 mol L^-1 HCN and 0.10 mol L^-1 LiCN C) a solution that is 0.10 mol L^-1 NaOH and 0.10 mol L^-1 HNO₃ D) a solution that is 0.10 mol L^-1 HNO₃ and 0.10 mol L^-1 KNO₃ E) a solution that is 0.10 mol L^-1 HCN and 0.10 mol L^-1 NaCl

Question

Quizplus · Accepted Answer

A buffer system consists of a weak acid and its conjugate base or a weak base and its conjugate acid. Option B contains HCN, a weak acid, and LiCN, its conjugate base, making it a good buffer system. The other options contain either strong acids or bases, or do not have a weak acid/weak base conjugate pair.

Which of the Following Solutions Is a Good Buffer System