This question is about fertilisers - AQA - GCSE Chemistry - Question 5 - 2021 - Paper 2
Question 5
This question is about fertilisers.
Some fertilisers are described as NPK fertilisers because they contain three elements needed for healthy plant growth.
Which tw... show full transcript
Worked Solution & Example Answer:This question is about fertilisers - AQA - GCSE Chemistry - Question 5 - 2021 - Paper 2
Step 1
Which two compounds each contain two of these elements?
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Answer
The two compounds that each contain two of the three essential nutrients for healthy plant growth are:
Ammonium phosphate
Potassium nitrate
Step 2
Name the soluble salts produced when calcium phosphate reacts with nitric acid.
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Answer
When calcium phosphate reacts with nitric acid, the soluble salt produced is calcium nitrate.
Step 3
Name the soluble salts produced when calcium phosphate reacts with phosphoric acid.
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When calcium phosphate reacts with phosphoric acid, the soluble salt produced is calcium dihydrogen phosphate.
Step 4
Evaluate the two methods for producing a large mass of ammonium sulfate.
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Answer
The industrial process for producing ammonium sulfate is beneficial as it operates on a larger scale and is a continuous process, allowing for higher yields. This method is quicker and more efficient for large quantities.
In contrast, the laboratory method is smaller scale and requires repeated processes, making it less efficient for producing large masses. Although it can produce pure crystals, it is time-consuming and not suitable for large-scale production.
Overall, while the laboratory method has its merits for small-scale production, the industrial method is preferable for producing large amounts of ammonium sulfate due to its efficiency and scale.
