The Following Compounds Are Available as 0

question 89

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

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