Answer:
d . all of the above
Step-by-step explanation:
A buffer system can be formed in one of two ways:
- A weak acid and its conjugate base
- A weak base and its conjugate acid
Which of the following combinations would form a buffer solution?
a. HF and LiF. YES. HF is a weak acid and F⁻ (from LiF) is its conjugate base.
b. NH₃ and NH₄Br. YES. NH₃ is a weak base and NH₄⁺ (from NH₄Br) is its conjugate acid.
c. HNO₂ and NaNO₂. YES. HNO₂ is a weak acid and NO₂⁻ (from NaNO₂) is its conjugate base.