The reactions represented below take place during one of the industrial processes used in the fertiliser industry:
I: 4NH₃(g) + 5O₂(g) ⇌ 4NO(g) + 6H₂O(g) ΔH < 0
II: NO(g) + O₂(g) ⇌ X
III: NO₂ + H₂O(l) ⇌ HNO₃(aq) + _____
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10.1.1 The name of this industrial process - NSC Physical Sciences - Question 10 - 2017 - Paper 2
Question 10
The reactions represented below take place during one of the industrial processes used in the fertiliser industry:
I: 4NH₃(g) + 5O₂(g) ⇌ 4NO(g) + 6H₂O(g) ΔH < 0
I... show full transcript
Worked Solution & Example Answer:The reactions represented below take place during one of the industrial processes used in the fertiliser industry:
I: 4NH₃(g) + 5O₂(g) ⇌ 4NO(g) + 6H₂O(g) ΔH < 0
II: NO(g) + O₂(g) ⇌ X
III: NO₂ + H₂O(l) ⇌ HNO₃(aq) + _____
Write down:
10.1.1 The name of this industrial process - NSC Physical Sciences - Question 10 - 2017 - Paper 2
Step 1
10.1.1 The name of this industrial process
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Answer
The name of this industrial process is the Ostwald process.
Step 2
10.1.2 The function of Pt in reaction I
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Answer
Platinum (Pt) acts as a catalyst, increasing the rate of the reaction.
Step 3
10.1.3 The NAME of product X
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Answer
Product X is nitrogen dioxide (NO₂).
Step 4
10.1.4 A balanced equation for reaction III
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Answer
The balanced equation for reaction III is:
ightleftharpoons HNO₃ + HNO₂$$
Step 5
10.1.5 TWO ways in which the yield of the NO(g) obtained in reaction I can be increased without changing the amount of reactants and products
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Increase the pressure of the reaction mixture, as this promotes the formation of gas products.
Increase the temperature of the reaction, which favors the endothermic direction.
Step 6
10.2.1 What does NPK mean?
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NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K), which are the three essential nutrients for plants.
Step 7
10.2.2 Consider the fertiliser illustrated below
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Answer
To calculate the mass of KCl needed to produce 50 kg of fertiliser:
Determine the proportion of KCl in the fertiliser, which is given as \( rac{3}{8} \).
