For the second stoichiometric point of H2
, basically I did some calculations and got that for S2
, the [OH-
, which is what the answer key had. I didn't have any problems with the calculations up to that point, it was after this where I have questions.
Basically, the answer key says that since 4.30*10-8
, so the pH=7.0 at the second stoichiometric point. This seems a bit odd to me because if this were the case, is the pH of the second stoichiometric point of all diprotic acids be pH=7.0 or higher? And also, If you calculated [H+
] from [OH-
, shouldn't it give a [H+
, so pH<7.0?