alleryStart learning →What is the equivalence point of a titration?
AThe point at which the indicator first changes
BThe volume holding base equivalent to the acid
CThe point at which the pH stops changing at all
DThe volume at which the curve becomes horizontal
Answer & Solution
Correct answer: B. The volume holding base equivalent to the acid
1. A titration curve plots pH against the volume of titrant added.
2. Its point of inflection sits at the middle of the steep vertical section.
3. That inflection appears when the base added matches the acid present by stoichiometry.
4. The titrant volume that delivers that matching amount is the equivalence point.
5. The indicator end point is a separate thing, chosen to fall close to it.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 14 "Acid-Base Equilibria", section 14.7 Acid-Base Titrations_
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