Question

preparation of ammonia​

Answer 1

Answer:

Preparation of Ammonia – NH

Ammonia is easily made in the laboratory by heating an ammonium salt, such as ammonium chloride NH4Cl with a strong alkali, such as sodium hydroxide or calcium hydroxide. The gas may also is made by warming concentrated ammonium hydroxide.

Answer 2

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Ammonia is formed by the hydrolysis of urea

$NH_2CONH_2$ → $2NH_3$ +$CO_2$

Ammonium is prepared in the laboratory by health an ammonium salt with a base.

$2NH_4$+ OH → $2NH_3$+$H_2O$

$2NH_4Cl$+CaO → $CaCl_2$ + $2NH_3$ + $H_2O$

It can also be prepared by heating a metal nitrites such as magnesium nitride with Water

$Mg_3N_2$ + $6H_ 2O$ → $3Mg(OH)_2$ + $2NH_3$

It is industrially manufactured by passing nitrogen and hydrogen over iron catalyst (a small amount of $K_2O$ and Al₂O₃ is also used to increase the rate of attainment of equilibrium) at 750K at 200 atm pressure. In the actual process the hydrogen required is obtained from water gas and nitrogen from fractional distillation of liquid air.