๐Ÿ”ฌ MCAT Exam Prep

A buffer solution resists changes in pH because it contains:

A A strong acid and its salt
B A weak acid and its conjugate base
C Two strong acids
D Water only

โœ“ Correct Answer: Option B

Buffer solutions contain a weak acid/base pair. The weak acid neutralizes added base; the conjugate base neutralizes added acid.

๐Ÿ’ก Why is B) the correct answer?

The correct answer to the question "A buffer solution resists changes in pH because it contains:" is Option B: A weak acid and its conjugate base.

The other options โ€” A) A strong acid and its salt, C) Two strong acids, D) Water only โ€” are incorrect for this MCAT Exam Prep question. As explained above: Buffer solutions contain a weak acid/base pair. The weak acid neutralizes added base; the conjugate base neutralizes added acid.

๐Ÿ“š About This MCAT Exam Prep Practice Question

This 2-level MCAT Exam Prep question from the Chemical & Physical Foundations topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free MCAT Exam Prep practice test or use flashcards for spaced repetition review.

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