C6.1 start

Question 1

what elements do plants need

Answer 1

nitrogen
phosphorus
potassium

Question 2

nitrogen deficiency causes

Answer 2

poor growth
yellow leaves

Question 3

phosphorus deficiency causes

Answer 3

poor root growth
discoloured leaves

Question 4

potassium deficiency causes

Answer 4

poor fruit growth
discoloured leaves

Question 5

what is haber process used to make

Answer 5

fertilisers

Question 6

hydrogen is

Answer 6

natural gas

Question 7

nitrogen is obtained from

Answer 7

air , liquified air or steam

Question 8

what is required for haber process

Answer 8

high temperatures
catalyst
and high pressure

Question 9

how to make potassium sulfate in a lab

Answer 9

-add dilute potassium hydroxide (KOH) in a flask with phenolphthalein
- add dilute H2SO4 from burette or pipette until solution changes from pink to colourless
- add activated charcoal to remove phenolphthalein
- warm filtrate with bunsen burner to leave potassium sulfate
-leave to dry

Question 10

how to make ammonium sulfate

Answer 10

same as potassium
- add ammonia solution
-just be careful not to inhale ammonia gas
-use methyl orange indicator (yellow to red)
- add extra ammonia solution to ensure reaction is complete

Question 11

batch process

Answer 11

small amount, one at a time

Question 12

continuous process

Answer 12

large amounts and run all the time

Question 13

compare industrial and laboratory production of fertilisers

Answer 13

in lab substances are brought from chemical manufacturers

in fertilisers factories they start with raw materials which must be purified before used