Explain why only one hydrogen atom is acidic in KHP...
2007-06-27 07:55:21 · 4 answers · asked by af_woody1892 1 in Science & Mathematics ➔ Chemistry
Is KHP potassium hydrogen phthalate or should I keep guessing?
If that's it, then it's because there is only 1 hydrogen that is part of an acid group, the rest are part of the benzene ring.
2007-06-27 08:00:49 · answer #1 · answered by anotherhumanmale 5 · 1⤊ 0⤋
Phthalic Acid has two acidic protons, each bonded to one carboxylic acid function. Both will dissociate however the second proton is a lot less acidic than the first.
KHP is the potassium salt of phthalic acid after the first, more acidic proton has been removed. Since one of the 2 phthalic acid protons has been removed (neturalized by KOH probably), there is only 1 acidic proton left.
The protons bonded to the O in a carboxylic acid function are acidit; the protons bonded directly to carbon are not. Therefore the other 4 protons in KHP, which are bonded to carbon are not acidic.
2007-06-27 15:09:09 · answer #2 · answered by GTB 7 · 0⤊ 0⤋
KHP is potassium hydrogen phthalate. The first hydrogen of the compound has already been neutralized, giving you the potassium hydrogen salt.
2007-06-27 15:03:16 · answer #3 · answered by hcbiochem 7 · 0⤊ 0⤋
see my answer to your earlier (duplicate) question.
2007-06-27 15:06:22 · answer #4 · answered by skipper 7 · 0⤊ 0⤋