Question

A buffer solution comprises which of the following ?
A. A weak acid in solution
B. A strong acid in solution
C. A weak base in solution
D. A Weak acid and its conjugate base in solution ​

Answer 1

Answer:

d) A weak acid and its conjugate base in solution

Feedback:

A buffer solution must comprise a weak acid and its conjugate base (or a weak base and its conjugate acid). It cannot just contain the weak acid or weak base in isolation.

Answer 2

The correct solution to the given question is option D: A Weak acid and its conjugate base in solution.

• A buffer solution media that has an equal balance of acid and basic components.
• A buffer comprises of either:

1. Weak acid + conjugate base (Acidic buffer)
2. Weak base + conjugate acid (Basic buffer)

• By producing alternative components, this mixture preserves pH homeostasis in the face of any pH shift.
• There are no single components in it, such as only weak acid, strong acid, or weak base.
• Therefore weak acid and conjugate base forms buffer mixture.