3.3. Fertilisers Flashcards
What are the 3 main mineral elements are needed for plant growth?
( LO 31 )
What is a fertiliser?
A soluble salt containing one or more of
N (as NO3- ions)
P (as PO43- ions)
K (as K+ ions)
Why must N P and K be in the forms they are and not as elements?
Elemental forms are not soluble in water and can’t be taken up by roots
How is each mineral element used in plants?
How are salts made?
By neutralising acids with bases.
What is the molecular formula for ammonia?
NH3
What shape is the ammonia molecule?
( Unit 1 revision )
Trigonal pyramidal
Show how the outer electrons are shared in an ammonia molecule
( Unit 1 revision)
What are the properties of ammonia?
( LO 34 )
What is the equation for the reaction of ammonia with water?
( LO 34 )
What is the chemical test for ammonia?
Turns damp pH paper blue
What is the balanced equation for the formation of ammonia from elements?
Haber process diagram
What is the catalyst in the Haber process?
Iron (Fe)
What is the temperature and pressure in the Haber Process
Temp: 450ºC
Pressure: 200 atmospheres