AP Chemistry / Unit 8: Acids and Bases
8.5 Acid-Base Titrations
Notes
A titration curve shows pH vs volume of titrant.
- Half-equivalence point: $pH=pK_a$.
- Choose an indicator whose color change matches the equivalence pH.
Practice
At the half-equivalence point of a weak acid titration:
$[HA]=[A^-]$.
A diprotic acid's titration curve has:
One per proton.
Before any base is added, a weak acid's pH is:
Less ionized.
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