# Is picric acid a very strong acid?

Picric acid has nitro groups in para and ortho positions, so it has great possibility to go for resonance, thus it is supposed to be a very good acid. But a question arises! The $\ce{O}$ of $\ce{-OH}$ has intramolecular $\ce{H}$-bonding with ortho-nitro groups present on both sides. So will the firstly mentioned theory work well or is the answer something else?

• Good, maybe. Depends on what you want to use it for. Or do you mean if it is a strong acid, like what is the pKa of pricric acid? – logical x 2 Oct 20 '16 at 16:57
• @ketbra Is o- effect working here? – Resorcinol Oct 20 '16 at 17:00
• It's not a great H-bond. The ideal H-bond is linear. – Zhe Oct 20 '16 at 17:46
• – Nicolau Saker Neto Oct 20 '16 at 21:12