Editing Titration (section)

===Endpoint and equivalence point===
Though the terms equivalence point and endpoint are often used interchangeably, they are different terms.  ''Equivalence point'' is the theoretical completion of the reaction: the volume of added titrant at which the number of [[Mole (unit)|moles]] of titrant is equal to the number of moles of analyte, or some multiple thereof (as in [[polyprotic]] acids).  ''Endpoint'' is what is actually measured, a physical change in the solution as determined by an [[pH indicator|indicator]] or an instrument mentioned above.<ref>
{{Cite book
  | last = Harris
  | first = D.C.
  | title = Quantitative Chemical Analysis
  | publisher = Macmillan
  | edition = 6
  | year = 2003
  | pages = 129
  | isbn = 0-7167-4464-3
}}</ref>

There is a slight difference between the endpoint and the equivalence point of the titration. This error is referred to as an indicator error, and it is indeterminate.<ref>
{{Cite book
  | last = Hannan
  | first = H.J.
  | title = Technician's Formulation Handbook for Industrial and Household Cleaning Products
  | publisher = Lulu.com
  | year = 2007
  | pages = 103
  | isbn = 978-0-615-15601-9
}}{{self-published source|date=February 2020}}</ref>{{self-published inline|date=February 2020}}