An indicator used in a metal EDTA titration is a diprotic

Last updated: 6/30/2023

An indicator used in a metal EDTA titration is a diprotic acid H A with pK values of pk 7 0 and pk 2 12 0 In a solution buffered at pH 11 the most predominant species of this indicator is 42 OH A O equal amount of H A and HA HA equal amount of HA and A 2