Chemistry / Unit 10 Chem 1881 short lesson, about 20 seconds
Equivalence Point vs. Endpoint Distinguished
Captions available
The idea
The equivalence point is where moles of acid and base have exactly reacted, a stoichiometric fact; the endpoint is where the indicator visibly changes color.
In practice
A well-chosen indicator changes color within a drop of the true equivalence point.
Where people slip
The two are related but not identical — one is calculated, the other observed.
Your place on the trail
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