Ammonia Acid Worksheet With Answers Page 34
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49M1.
(a)
oxygen / O
2
(do not allow air) for 1 mark
1
(b)
(i)
idea that
it is a catalyst / it increases the rate of reaction / lowers
activation energy
for 1 mark
1
(ii)
the reaction is exothermic or releases energy / heat
for 1 mark
1
(c)
idea that
•
hot gases from the first reaction vessel need to be cooled
•
incoming gases / ammonia / oxygen need to be heated
•
there is an energy saving / cost saving
any two for 1 mark each
2
(d)
water and oxygen
(need both)
(accept H
O and O
)
2
2
for 1 mark
1
(e)
idea that
•
breaking bonds / breaking up molecules requires a lot of
energy / reaction has a high activation energy
•
gives a better / faster rate of reaction
•
the reaction is endothermic / more energy needed to
break existing bonds than to form new ones
allow a higher temperature gives a greater yield / pushes
the equilibrium position to the right
any two for 1 mark each
2
(f)
ammonia (solution) / ammonium hydroxide
(credit NH
NH
OH)
3
4
nitric acid / HNO
3
in any order for 1 mark each
2
[10]
Page 34 of 49
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