fertilisers Flashcards
what elements do growing plants require in there fertiliser?
nitrogen, phosphorus and potassium
what are fertilisers
substances which restore elements essential for healthy plant growth to the soil
What compounds are required to produce soluble nitrogen??
ammonia and nitric acid
what does nitrogen contain that can be used for fertilisers?
salts
what are some of the properties of ammonia
Pungent, clear and a colourless gas which dissolves in water to produce an alkaline solution
What process is used to produce the ammonia required for fertiliser production?
Haber
Why is moderate temperature used for production of ammonia in the Hager process
This is because when the temperature is to low the reaction is too slow but if too high ammonia will break up to form nitrogen and hydrogen quickly
What process is carried out under high pressure
Haber
What kind of catalyst is used in the havre process to increase rate of reaction
An iron catalysts
What is the starting material for the commercial production of nitric acid in the Ostwald process
Ammonia
What does the Ostwald process use to produce nitric acid
Ammonia oxygen and water
What kind of catalyst is used in the Ostwald process
Platinum catalyst
How to test for potasium in fertiliser?
Flame test
Equation for industrial production of ammonia
N2 + H2 (reversable sign) NH3
