Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What uses do we have for the ammonia produced through the Haber process?
   • Ammonia can be used to manufacture ammonium salts (used in fertilisers) and nitric acid.
2. Recall the names of the salts produced when phosphate rock is treated with: a) nitric acid b) sulfuric acid c) phosphoric acid
   • a) Calcium nitrate b) Single superphosphate (a mixture of calcium sulfate and calcium phosphate) c) Triple superphosphate (calcium phosphate)
3. What process is used to extract rocks containing phosphate compounds from the earth?
   • Mining. - The phosphate containing rocks must be processed further prior to being used in fertilisers.
4. How can rocks containing phosphate compounds be treated, in order to make soluble salts that can be used as fertilisers?
   • Phosphate rock is treated with nitric acid or sulfuric acid to produce soluble salts that can be used as fertilisers.
5. NPK fertilisers all contain which 3 elements?
   • N = Nitrogen P = Phosphorus K = Potassium
6. Can NPK fertilisers be made using a variety of raw materials and different reactions?
   • Yes, Industrial production of NPK fertilisers can be achieved using a variety of raw materials in several integrated processes
7. NPK fertilisers are formulations of various salts. What is a formulation?
   • Any mixture or substance prepared according to a particular formula. NPK fertilisers are formulations of various salts containing appropriate percentages of the elements (nitrogen, phosphorus and potassium).