Help please! :) analytical chemistry: I have to find the pH of a titration of lysine at 75%. The volume that corresponds to this point is 112.5mL of 0.0625M NaOH, and originally there were 25mL of 0.125M lysine. My problem is that the last 2 pkas overlap because they are not different by 3 magnitudes, so I do not know how to calculate the pH.

Question

anonymous · Answer

The pkas are:
pka1=2.16
pka2=9.06
pka3=10.54

anonymous · Answer

attachment

koikkara · Answer

@Dama28 hai, i don't know how to explain that... check out, http://www.masterorganicchemistry.com/2010/06/18/know-your-pkas/