Question

write equation to prepare urea from ammoniumcyanate​

Answer 1

Answer:

Friedrich Wöhler (1800 - 1882) carried out several reactions that resulted in the production of Urea [ (NH2)2CO ], an organic component of urine. One such reaction used lead cyanate and ammonia in aqueous solution:

{\displaystyle

{\ce {{Pb(OCN)2}+ {2NH3}+ 2H2O -> {Pb(OH)2}+

{2NH4(OCN)}}}}

Ammonium cyanate decomposes to Ammonia and Cyanic acid, which react reversibly to produce Urea:

{\displaystyle

{\ce {{NH4(OCN)}-> {NH3}+ HOCN <=>

{(NH2)2CO}}}}

Wöhler's synthesis has historically been presented as the beginning of Organic Chemistry, as the first in vitro synthesis of a chemical compound otherwise produced only by living systems. Alternatively, "The Wöhler Myth" suggests instead this discovery was more or less accidental, and that he did not set out deliberately to make an organic synthesis to disprove vitalism, a notion championed by his own teacher, Jöns Jacob Berzelius (1779 - 1848).

Wöhler reportedly wrote Berzelius, ""I cannot, so to say, hold my chemical water and must tell you that I can make urea without thereby needing to have kidneys, or anyhow, an animal, be it human or dog".

Answer 2

Answer:

CH4NO on heating CO(NH2) 2