Which pair(s) of substances would make a suitable buffer pair combination?
I. NaOH and NaBr
II. HF and NaF
III. CH₃NH₃⁺Cl^- and CH₃NH₂

Question

Which pair(s) of substances would make a suitable buffer pair combination? I. NaOH and NaBr II. HF and NaF III. CH₃NH₃⁺Cl^- and CH₃NH₂

Quizplus · Accepted Answer

A suitable buffer pair consists of a weak acid and its conjugate base or a weak base and its conjugate acid. II (HF and NaF) is a pair of a weak acid (HF) and its conjugate base (F- from NaF). III involves a weak base (CH3NH2) and its conjugate acid (CH3NH3+ from CH3NH3Cl), making both suitable for buffer solutions. I (NaOH and NaBr) does not form a buffer as it involves a strong base (NaOH) and a salt that does not contain the conjugate acid or base of the strong base.

Which Pair(s) of Substances Would Make a Suitable Buffer Pair