How can we obtain dry ammonia in lab write with Principle and chemical reaction involve
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Laboratory method for the preparation of ammonia:
Ammonium chloride is heated with calcium hydroxide.
2NH
4
Cl+Ca(OH)
2
Δ
CaCl
2
+2NH
3
+2H
2
O
Moist ammonia gas is dried over CaO (quik lime).
The reactions of ammonia with:
(i) Oxygen in presence of platinum at 800
o
C.
4NH
3
+5O
2
Pt
800
o
C
4NO+6H
2
O
(ii) Red hot copper oxide.
2NH
3
+3CuO
Δ
3Cu+3H
2
O+N
2
Ammonium chloride is heated with calcium hydroxide.
2NH
4
Cl+Ca(OH)
2
Δ
CaCl
2
+2NH
3
+2H
2
O
Moist ammonia gas is dried over CaO (quik lime).
The reactions of ammonia with:
(i) Oxygen in presence of platinum at 800
o
C.
4NH
3
+5O
2
Pt
800
o
C
4NO+6H
2
O
(ii) Red hot copper oxide.
2NH
3
+3CuO
Δ
3Cu+3H
2
O+N
2
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