Fertilisers Flashcards
What nutrients do growing plants require
Nitrogen, phosphorous and potassium
What is the purpose of fertilisers
To restore elements, essential to plant growth, to the soil
What is the name of the process that makes ammonia
Haber process
What are the properties of ammonia
It is a pungent, colourless gas which produces and alkali soloution when dissolved
What are the reactants for the process
Hydrogen and nitrogen
What catalyst is used in the process
Iron catalyst
What does the double arrow sign mean?
The reaction is reversible
The reaction does not run at 100% yield and unreacted gases are present after the process. How is this process made more economical?
The unreacted gases are recycled back into the reaction
What important chemical is produced from ammonia by the ostwald process?
Nitric acid
Apart from ammonia what are the other starting materials used in the process
Oxygen and water
Ammonia and nitric acid can react together to form a fertiliser. What type of reaction is this and what is the product
Neutralisation, ammonium nitrate
