Key Area 3: Fertilisers

Question 1

Growing plants require?

Answer 1

nutrients

Question 2

The three primary nutrients are?

Answer 2

Nitrogen, phosphorus potassium

Question 3

the order of nutrients is?

Answer 3

N-P-K

Question 4

Nitrogen

Answer 4

is needed for green foliage

Question 5

Phosphorus

Answer 5

is need for strong roots

Question 6

Potassium

Answer 6

is needed for healthy growth

Question 7

Fertilisers are?

Answer 7

substances whivh restore elements essential for healthy plant growth to the soil.

Question 8

Ammonia is a what gas?

Answer 8

Pungent clear colourless

Question 9

Ammonia dissolves in?

Answer 9

Water to produce an alkaline solution

Question 10

Ammonia and nitric acid are important compounds used to produce?

Answer 10

Soluble, nitrogen containing salts that can be used as fertilisers

Question 11

Ammonia solutions react with?

Answer 11

Acids to form soluble salts

Question 12

Ammonia solution + ? —> ? + ?

Answer 12

Ammonia solution + acid —> ammonium salt + water

Question 13

The haber process is used to produce?

Answer 13

The ammonia required for fertiliser production

Question 14

At low temperature the forward reaction is?

Answer 14

Too slow to be economical

Question 15

N2 + 3H2 (reversible arrows) ?

Answer 15

2NH3

Question 16

If the temperature is increased the rate of reaction?

Answer 16

Increases

Question 17

As the temperature increases the backwards reaction becomes?

Answer 17

More dominant

Question 18

A ? Catalyst is used to increase reaction rate?

Answer 18

Iron

Question 19

Ammonia is the starting material for the?

Answer 19

Commercial production of nitric acid

Question 20

The otswald process uses ? To produce nitric acid

Answer 20

Ammonia, oxygen and water

Question 21

What catalyst is used in the otswald process?

Answer 21

Red hot Platinum

Question 22

The haber process is the basis for the industrial production of

Answer 22

Ammonia

Question 23

The haber process needs an

Answer 23

Iron catalyst, temperature of 450 degrees and a pressure of 200 atmospheres

Question 24

Word equation for the Haber process

Answer 24

Nitrogen + Hydrogen <—->ammonia

Question 25

The haber process is

Answer 25

Reversible

Question 26

Some uses of ammonia are

Answer 26

Fertilisers, nitric acid and dyes

Question 27

Ammonia is a?

Answer 27

Weak base and is extremely soluble in water

Question 28

Ammonia + hydrochloric acid —<

Answer 28

Ammonia chloride

Question 29

The otswald process is reacting

Answer 29

Oxygen and ammonia to produce nitrogen oxides

Question 30

Fertilisers must be?

Answer 30

Soluble in water so that plants can absorb the minerals through their roots.

Question 31

Relative atomic mass formula

Answer 31

mass of element finding ------------------------------------- X 100 gfm

Question 32

Ammonia is used in the manufacture of

Answer 32

Fertilisers, nitric acids and dyes

Question 33

To make the Ostwald process environmentally friendly draw an arrow from the first carbon monoxide to the?

Answer 33

Second carbon monoxide

Question 34

In the Haber Process, ammonia is produced from

Answer 34

nitrogen and hydrogen