Which of the following solutions is a good buffer system? A)a solution that is 0.10 M NaCl and 0.10 M HCl B)a solution that is 0.10 M HCN and 0.10 M LiCN C)a solution that is 0.10 M LiOH and 0.10 M HNO₃ D)a solution that is 0.10 M HNO₃ and 0.10 M LiNO₃ E)a solution that is 0.10 M HCN and 0.10 M KBr

Question

Quizplus · Accepted Answer

A buffer system requires a weak acid and its conjugate base or a weak base and its conjugate acid. In option B, HCN is a weak acid and LiCN is its conjugate base, making it a good buffer system. Option A has HCl, which is a strong acid and cannot act as a buffer system. Option C has LiOH, which is a strong base and cannot act as a buffer system. Option D has HNO₃, which is not a recognizable acid or base and cannot act as a buffer system. Option E has HCN and KBr, neither of which is a conjugate pair and therefore cannot act as a buffer system.

Which of the Following Solutions Is a Good Buffer System