[specOTL]

Ok, so I know all the necessary values to plot a gran function F1 e.g. mass of titrant versus (Vo+Vt)10^-pH on a graph.

What I am having problems with is how to get the values. What I mean is getting pH from pKa. My instructor explicitly stated that he wants us to graph the Gran Function F1 with the mass of titrant given and the pKa value. My problem is that I don't know how to calculate pH from pKa.

I thought about using henderson-hasselbach eq. but I don't know the concentration of A-/HA so thats out of the question. 

Any help would be appreciated

[Borek]

So your question is just a general "how to calculate titration curve"?

http://www.titrations.info/acid-base-titration-curve-calculation