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Terms in this set (6)
How does atmospheric nitrogen convert to ammonia?
Haber process (3H₂ +N₂ → 2NH₃) and nitrogen fixation by enzymes found in nodules on roots of legumes.
How does ammonia convert to nitrates in the soil (or water) (form where plants are able to access the nitrogen)?
Microbes convert the ammonium ion to NO₂⁻ to NO₃⁻ (oxidation)
What is the term for plants absorbing nitrates?
How does atmospheric nitrogen convert to nitrogen dioxide and then to nitrates?
Firstly by lightening or forest fires convert O₂ and N₂ to → 2NO and then again 2NO + O₂→ 2NO₂. To convert NO₂ to nitrates, the nitrogen dioxide is dissolved in atmospheric water ie NO₂ + H₂O → H⁺ + NO₃⁻ +HNO₂
What are other sources of nitrates and ammonia that occur naturally but not from atmospheric nitrogen?
Decaying plant and animal matter. In aerobic decay, the nitrogen decays to nitrates and in anaerobic decay it converts to ammonia.
How do nitrates reduce to diatomic nitrogen or nitrous oxide (N₂O)?
Catalysed by enzymes present in micro-organisms where nitrous oxide is also released.
THIS SET IS OFTEN IN FOLDERS WITH...
Nitrogen and Phosphorous
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