Class 12 Chemistry P Block Elements Preparation of Dinitrogen

Preparation of DiNitrogen

  • It is prepared by reacting ammonium chloride with sodium hydroxide that is:

               NH4Cl         +       NaOH   -->  NaCl + N2 + H2O

             Ammonium chloride    soda lime   sodium chloride

This nitrogen so formed has impurities nitric oxide and nitric acid. So, in order to remove them we have to bubble this nitrogen through concentrated sulphuric acid.

  • Pure nitrogen can be prepared by heating Barium nitrate :

                  Ba(NO3)2 ---> Ba + N2 + O2

               Barium nitrate   Barium     Nitrogen

                          (On heating)

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