AP Chemistry / Unit 8: Acids and Bases
8.4 Acid-Base Reactions and Buffers
Notes
- Strong acid + strong base → water; equivalence pH 7.
- Weak acid + strong base → conjugate base; equivalence pH > 7.
- Buffers (weak acid + its conjugate base) resist pH change.
Practice
Equivalence pH for acetic acid titrated with NaOH:
The acetate ion is basic.
Which pair makes a buffer?
Weak acid and its conjugate base.
A buffer resists pH change because:
Both components react.
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