Skip to content

Nitration of Benzene

One of the hydrogen atoms on the benzene ring can be replaced by a nitro- group (NO2).
A nitrating mixture is prepared in a round-bottomed flask by mixing concentrated sulfuric acid and concentrated nitric acid carefully.
The mixture needs to be cooled in a beaker of cold water.
Benzene is added carefully to the nitrating mixture making sure the temperature is kept below 50°C.
A reflux condenser is added and the mixture heated in a water bath of 50°C until nitrobenzene - a pale yellow liquid - is formed.
If the reaction takes place at a higher temperature, further substitution to form dinitrobenzene or trinitrobenzene may occur.
Nitration of Benzene:

H2SO4 + HNO3 → HSO4- + H2NO3+


H2NO3+ → H2O + NO2+


HSO4- + H+ → H2SO4

Read the text

Read the text and highlight anything you think is important. When you go on, the text is hidden and you answer from memory.