Ammonia Chemical Bonding Worksheet Page 14
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28(ii)
The Haber Process is usually carried out at a higher temperature than that which
would produce the maximum yield. Suggest why.
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(2)
(c)
Ammonia can be converted into nitric acid in three stages:
Stage 1
Ammonia reacts with oxygen from the air to form nitrogen monoxide and
water
4NH
+
5O
4NO
+
6H
O
3
2
2
Stage 2
On cooling, nitrogen monoxide reacts with oxygen from the air to form
nitrogen dioxide.
Stage 3
Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide.
(i)
Describe the conditions under which the reaction in Stage 1 takes place.
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(3)
(ii)
Balance the equation for the reaction at Stage 2.
NO
+
O
NO
2
2
(1)
(iii)
Balance the equation for the reaction at Stage 3.
NO
+
H
O
HNO
+
NO
2
2
3
(1)
(d)
The chemical plant for manufacturing ammonia is often on the same site as plants
manufacturing nitric acid and fertilisers.
(i)
What advantages will this have for the manufacturing company?
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(2)
Page 14 of 28
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