The Following Compounds Are Available as 0

Multiple Choice

The following compounds are available as 0.10 M aqueous solutions: pyridine (pK_b = 8.82) ,triethylamine (pK_b = 3.25) ,HClO₄,phenol (pK_a = 9.96) ,HClO (pK_a = 7.54) ,NH₃ (pK_b = 4.74) and NaOH.Identify two solutions that could be used to prepare a buffer with a pH of approximately 5.

A) pyridine and HClO₄
B) triethylamine and HClO₄
C) phenol and NaOH
D) HClO and NaOH
E) HClO and NH₃