fertilisers

Question 1

fertilisers

Answer 1

substances which restore elements that are essential for plant growth - soluble in water, mixture of chemicals which provide correct amount of nutrients for crop

Question 2

main compounds in fertilisers

Answer 2

ammonium salts, potassium salts, nitrates and phosphates

Question 3

3 elements required for plant growth

Answer 3

nitrogen, phosphorus and potassium

Question 4

ammonia formula

Answer 4

NH3

Question 5

colour of ph paper after ammonia dissolves in water

Answer 5

blue/purple - alkaline solution

Question 6

why are fertilisers soluble

Answer 6

so water can be taken into plant from roots

Question 7

2 reactants of haber process

Answer 7

nitrogen and hydrogen

Question 8

production of ammonia reaction

Answer 8

N2 + 3H2 reverse arrows 2NH3

Question 9

catalyst used in haber and Ostwald process

Answer 9

haber = iron
Ostwald = platinum

Question 10

compound which wouldn’t be used as a fertiliser

Answer 10

sodium chloride

Question 11

ammonia can be converted into nitric acid, which process is this

Answer 11

Ostwald process