Question

The buffer capacity is:

• A. the ability of a buffer solution to resist a change in pH on the addition of strong acid or strong alkali.
• B. the ability of a buffer solution to resist a change in pH on the addition of weak acid or strong alkali.
• C. the ability of a buffer solution to resist a change in pH on the addition of strong acid and weak alkali.
• D. the ability of a buffer solution to resist a change in pH on the addition of weak acid or weak alkali.

Hint:

Buffers are “Strong” defenders against “Strong” intruders (acids/bases).

Answer 1

The Correct Option is A

Step 1: Concept
A buffer is a solution that resists changes in pH when small amounts of acid or base are added.

Step 2: Meaning
Buffer capacity measures the quantity of acid or base a buffer can neutralize before its pH changes significantly.

Step 3: Analysis
The standard definition refers to effectiveness against strong acids or strong alkalis, as these cause the most drastic pH shifts.

Step 4: Conclusion
Option (A) provides the most accurate definition of buffer capacity.

Final Answer: (A)