AP Chemistrymediummcq1 pt
A buffer solution resists changes in pH because it:
A.Is always neutral (pH = 7)
B.Contains a weak acid and its conjugate base
C.Contains a strong acid and a strong base
D.Has a very high concentration of H⁺ ions
Explanation
Core Concept
A buffer consists of a weak acid and its conjugate base (or weak base and its conjugate acid). The weak acid neutralizes added base, and the conjugate base neutralizes added acid, resisting pH changes.
Correct Answer
BContains a weak acid and its conjugate base
More Unit 8: Acids and Bases practice questions
- mediumWhich mixture produces a buffer with pH closest to 9.0?
- mediumFor a weak acid, which approximation allows skipping the quadratic?
- mediumWhat is the pH of a solution after 0.0050 mol of HCl is added to 1.0 L of pure water?
- mediumIn the reaction HSO₄⁻ + H₂O ⇌ SO₄²⁻ + H₃O⁺, which species acts as a base?
- easyWhich of the following is the strongest base?
Practice more AP Chemistry questions with full explanations
Practice Unit 8: Acids and Bases Questions →