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 contain two of the three essential elements (nitrogen, phosphorus, and potassium) are:
Ammonium phosphate
Potassium nitrate
Step 2
Name the soluble salts produced when calcium phosphate reacts with nitric acid.
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Answer
The soluble salt produced when calcium phosphate reacts with nitric acid is calcium nitrate.
Step 3
Name the soluble salts produced when calcium phosphate reacts with phosphoric acid.
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Answer
The soluble salt produced when calcium phosphate reacts with phosphoric acid 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 and laboratory method for producing ammonium sulfate can be evaluated as follows:
Industrial Process:
This method is more suitable for large-scale production as it operates on a larger scale and is a continuous process.
It tends to be quicker and provides a consistent output of ammonium sulfate without the need for repetitive procedures.
Laboratory Method:
This approach is typically smaller in scale and more hands-on, making it suitable for educational purposes and small batch production.
However, it is slower and requires more steps, including crystallisation and filtration, which could potentially result in less efficiency when aiming for large quantities.
In conclusion, for large-scale production, the industrial method is superior due to its efficiency and continuous nature.
