Haber process and fertilisers extra GCSE questions
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Practice questions
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The Haber equation is
The Haber catalyst is
Typical Haber conditions are about
A low temperature would
Common mistakes
- The Haber process is not a fuel cell and not biogas. It is ammonia manufacture. Do not write that the iron is used up.
- Do not say a higher temperature is used to increase yield. It is used so the rate is fast enough. Yield of ammonia falls as temperature rises.
- Ammonia is not spread on fields as a Haber-tower gas and left at that. The spec fertilisers are ammonium salts (and related compounds). Do not mix this with mycoprotein or compost.
- Phosphate rock is not a product of N2 + 3H2. Do not treat it as an ammonium salt. Acid makes it soluble.
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