Considerations on the Derivative of the Titration Curve of a Weak Diacid

12 June 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


We show that the derivative of the titration curve of a diacid can be used to assess the first equivalent as well as the second equivalent point, but also the value for which pH=pKa. This is controlled by the difference between both pKa's of the diacid. A bifurcation is observed for the values of volume of titrant for which the first derivative cancels.


titration curve
acid base titrations
derivating a titration curve
equivalent point and derivative


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