Meet my Gran Plot

A Gran Plot is a rather nice way to find equivalence points in a titration given the titration curve itself. It'll even find analyte K_a (for an acid-base titration). There is some controversy as to exactly which points in the Gran plot to use, but overall I like Gran plots better than using derivatives, since calculating derivatives from data means that every single point on the derivative curve is approximate.

However, most people only show the lovely, linear part of the Gran plot (with a slight curvature near the equivalence point). So, meet my Gran plot.


*Resists urge to laugh*.

(Bonus: An observant reader will notice a second equivalence point on the plot.)