Don't know if this is against the rules, but could you be more direct in how to solve this question?
The first part makes total sense, thanks.
But when I think about the Henderson–Hasselbalch equation to find the pH,
(it would be "pH = Pka1 - log(([H2X] + moles of HCl)/([HX-] - moles of HCl))", right?)
I don't know the concentration of [H2X] or [HX-] to begin with so therefore I also wouldn't know what amount of HCl to add
Am I missing something? Damn this subject is hard