We are finishing up a study in acid-base chemistry for my UG and it dawned on me that I might have some misconceptions and that I would like to see if my "new" conclusions are correct:
1. At the equivalence point of a titration curve, the initial
amount of substance of the titrand is equal to the amount of substance of the titrant, but physically speaking, all of the initial amount of substance has been converted, so this new, changed
amount of substance is 0 (theoretically).
2. At the half equivalence point, half
of the initial
amount of substance of the titrand has been converted, meaning that there is only 50% left of the initial
amount of titrand.
3. For something like glycine hydrochloride when titrated with a strong base, it would mean that the isoelectric point would be at its first
equivalence point, as at this point, the initial
amount of substance, (which is not isoelectric) has been wholly converted into the isoelectric intermediate (center compound), meaning that neither the left or right compounds exist (theoretically) at this point in the titration, but only before and after respectively.
If this is correct, then I think I properly understand titrations.