Which of the following could be a buffer?
A)NaF
B)HF + NaF
C)HF + H2O
D)NaF + H2O
E)NaCl + HF

Question

Quizplus · Accepted Answer

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. A buffer consists of a weak acid and its conjugate base or a weak base and its conjugate acid. Option B contains both HF (a weak acid) and NaF (its conjugate base), which makes it a suitable buffer. Option A only contains NaF, which is a salt and not a buffer. Option C is just HF and water, which can form a weak acid, but there is no conjugate base present, so it is not a buffer. Option D is NaF and water, which will produce a basic solution and is not a buffer. Option E is NaCl and HF, which will produce a basic solution, and NaCl is not a weak acid or base, so it is not a buffer.

Which of the Following Could Be a Buffer