React benzene with conc. H2SO4 and then with conc. HNO3.
The resultant would be picric acid
Hydrochoric acid is more acidic than Picric acid.Added: Ka(Picric acid) = 0.38, Ka(HCl) >>1
for three electron withdrawing nitro groups, picric acid is highly acidic
Picric acid is acidic, as it has a fairly acidic phenolic proton. However, picric acid is not a carboxylic acid. Nevertheless, it is still called 'acid' because of its acidic proton, just as phenol was once called 'carbolic acid'.
Picric acid is a fairly strong acid. Most phenols are very weak acids, although they do react with strong bases. Since picric acid (2,4,6-trinitrophenol) has three strong electron-withdrawing nitro groups on its ring, its anion is more stable than most phenolates, and that makes it a much stronger acid.
Picric acid is a fixative (for example is found in Bouin's) but can be found in picrosirius red (is required for the sirius red stain to selectively bind collagen).
picric acid (or 2,4,6-trinitrophenol) is more acidic than benzoic acid The pKa or picric acid is 0.3 and that of benzoic acid is 4.2
Hydrochoric acid is more acidic than Picric acid.Added: Ka(Picric acid) = 0.38, Ka(HCl) >>1
The IUPAC name for picric acid is 2,4,6 trinitrophenol
preparation of m-nitro benzoic acid from benzene
for three electron withdrawing nitro groups, picric acid is highly acidic
Picric acid is acidic, as it has a fairly acidic phenolic proton. However, picric acid is not a carboxylic acid. Nevertheless, it is still called 'acid' because of its acidic proton, just as phenol was once called 'carbolic acid'.
The percentage of nitrogen in the picric acid is 18,34 %.
i truelywanna know why was picric acid used to treat burns?
It is the Saturated solution of Picric Acid and is used to test the presence of alkaloids. Alkaloids give yellow ppt. with Hager's reagent.
There are three deactivating -NO2 groups attached to benzene ring.They reduce electron density of benzene ring very much.So electrons of Oxgen in -OH group attract to benzene ring.Then the negativity of Oxygen reduces.So it is very much easy to break O-H bond and emmit H+.
Picric acid reduced pain and infection and allowed the formation of a scab under which healing took place.Using a one percent solution of picric acid, the wound was cleansed and then all blisters were pricked to release the serum (blister fluid), taking care not to remove the blister itself. The burn was covered with sterilized gauze soaked in the picric acid solution. The gauze was padded with cotton wool and held in place with a light bandage. After three or four days, the dressing was soaked off and the wound redressed.
Picric acid is a fairly strong acid. Most phenols are very weak acids, although they do react with strong bases. Since picric acid (2,4,6-trinitrophenol) has three strong electron-withdrawing nitro groups on its ring, its anion is more stable than most phenolates, and that makes it a much stronger acid.