Molecular formula: NH3
Principle: When finely crushed mixture of dry solid ammonium chloride and calcium hydroxide are heated in the ratio 2:1, they react with each other to give ammonia gas.
2NH4Cl + Ca(OH)2→CaCl2+ 2H2O + 2NH3
Uses of ammonia
When ammonia is treated with water, they react to give ammonium hydroxide.NH3 (g) + H2O (l) → NH4OH (aq)
Haber's process is a method of manufacture of ammonia into a large scale. In this method, nitrogen and hydrogen gases in the ratio of 1:3 are allowed to react at 500°C and 200-600 atmospheric pressure. In presence of Fe as catalyst and Mo as a promoter.
500°C / Fe, Mo
N2 + 3H2 → 2NH3
During the process of ammonia formation, water is also produced. When passed through calcium oxide, ammonia gets dried because calcium oxide is anhydrous in nature and suck water from the ammonia mixture.
The apparatus must be made airtight. The glass tube must be slightly inclined to reduce the risk of crack in it. The uniform heating should be provided.
No change in color is seen because ammonia in itself cannot change the color of litmus. When it reacts with water and forms ammonium hydroxide (a true base) then only it will be able to change the color of the litmus.
Ammonia can be easily identified with its smell, which is pungent. Further, ammonia is basic, so it can turn red litmus into blue.
Following are the four uses of ammonia
When ammonia is heated with sodium, soda amide is formed.
Na + NH3 → NaNH2 + H2
Carbondioxide is ______ in nature.
All the answers are correct
The molecular formula for ammonia is ______.
Ammonia dissolves in water to give solution called ______.
Ammona reacts with acids to produce ______.
When a mixture of dry and solid ______ are heated in the ratio 2:1, they react with each other to give ammonia.
sodium chloride and sodium hydrooxide
sodium chloride and sodium hydroxide
ammonium chloride and ammonium hydroxide
ammonium chloride and calcium hydroxide