Ammonia is made by reacting nitrogen with hydrogen - Edexcel - GCSE Chemistry - Question 5 - 2021 - Paper 1
Question 5
Ammonia is made by reacting nitrogen with hydrogen.
(a) The nitrogen and hydrogen are obtained from raw materials.
Draw one straight line from each gas to the raw ... show full transcript
Worked Solution & Example Answer:Ammonia is made by reacting nitrogen with hydrogen - Edexcel - GCSE Chemistry - Question 5 - 2021 - Paper 1
Step 1
Draw one straight line from each gas to the raw material it is obtained from.
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Answer
Hydrogen is obtained from air, and nitrogen is obtained from natural gas (or seawater).
Step 2
In a dynamic equilibrium two reactions occur at the same time.
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Answer
The forward reaction and the backward reaction.
The rates of the two reactions are equal.
Step 3
Calculate the value of 200 atmospheres in Pascals.
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Answer
To find the value in Pascals:
Pressure (Pa) = Atmospheres × 101 325
Pressure = 200 × 101 325 = 20 265 000 Pa.
Step 4
Complete the table showing the number of hydrogen molecules.
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Answer
Number of Molecules
Before Reaction Number of Molecules At Equilibrium Change in Number of Molecules
Nitrogen 4 2 -2
Hydrogen 2 0 -2
Ammonia 0 4 +4
Step 5
Complete the equation for this reaction:
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