I am not trolling. We have two tubes with one of sodium sulfate and one of sodium hydrogen sulfate.
A list of some chemicals are given to find out what is what.
The TES picked Bariumchloride, what is ok to determine sulfate. Also he want to take NaOH, but this is without indicator or pH probe not possible, to get a result.
At the end I gave a hint for the baking soda, which would react with the hydrogen sulfate.
The miracle is solved.
Between AWK came up with the discussion of k values of carbonic acid and sulfuric acid. But this will not help, if the TES don't know what is going on. It would be same we you know the a melting point of both but they are dissolved., if not can heat up. Probably it is a paperwork and no lab exercise.
Carbonate came into the rule after baking soda was picked up.
My answer was still, what to do with a k value if carbonate is not in the game.