This question is about fertilisers - AQA - GCSE Chemistry - Question 5 - 2021 - Paper 2

When calcium phosphate reacts with nitric acid, the soluble salt produced is calcium nitrate.

When calcium phosphate reacts with phosphoric acid, the soluble salt produced is calcium dihydrogen phosphate.

Industrial Process vs Laboratory Method

1. Industrial Process:

   • This method is performed on a large scale, making it suitable for mass production.
   • It is generally quicker as it operates continuously, allowing for a steady output of ammonium sulfate.
   • The process does not need to be repeated frequently, which improves efficiency.

2. Laboratory Method:

   • This method is suitable for small-scale production.
   • It typically requires more time, as it involves multiple manual steps and cooling periods.
   • The process usually needs to be repeated for larger quantities of ammonium sulfate.

Conclusion

Both methods have their advantages depending on the scale of production required. For industrial applications where large quantities are needed, the industrial process is preferable due to its efficiency and speed. Conversely, for smaller, experimental batches, the laboratory method is adequate.