Phosphorus, Fertilizers And Sulphur 🧪

Question 1

What 3 things can be said about P4 ?

Answer 1

Tetratomic
Non-metal solid
2,8,5 (5th group 3rd period)

Question 2

What 2 oxides of phosphorus can be made?

Answer 2

4P+3O2 —> 2 P2O3 phosphorous trioxide

4P+5O2 —> 2 P2O5 phosphorous pentaoxide

Question 3

What 2 chlorides of phosphorus can be made?

Answer 3

P+Cl2 —> PCl 2 phosphorous trichloride

P+Cl2 —> PCl5 phosphorous pentachloride

Question 4

What 2 acids can phosphorus make?

Answer 4

P2O5 + 3H2O—> 2H3PO4 phosphoric acid

P2O3 + 3H2O —> 2H3PO3 phosphorous acid

Question 5

What are fertilizers?

Answer 5

Chemicals used for plant growth

Question 6

What does each part of NPK do?

Answer 6

N growth of plants
P growth of roots
K to resist diseases

Question 7

What are 4 Fertilizers?

Answer 7

NH4NO3 Ammonium nitrate
K3PO4 Potassium Phosphate
KNO3 potassium nitrate
(NH4)3 PO4 Ammonium phosphate

Question 8

What is the harmful effect of excessive use of fertilizers?

Answer 8

Eutrophication

Question 9

What 6 things can be said about S8?

Answer 9

Polyatomic
Yellow solid
Non-metal solid
Crown shape
Insoluble in H2O
2,8,6 group 6 period 3

Question 10

What 2 oxides can S8 form on heating?

Answer 10

S + O2 —> SO2 sulphur dioxide
S + O2 —> SO3 sulphur trioxide

Question 11

What 2 acids can be formed by S8?

Answer 11

SO2 + H2O —> H2SO3 sulphurus acid
SO3 + H2O —> H2SO4 sulphuric acid

Question 12

What are sources of S8?

Answer 12

Sulphide ore

Question 13

What are sources of SO2?

Answer 13

Burning coal / coal industries

Question 14

What creates acid rain?

Answer 14

SO2 produced in factories reacts with O2 and rain water to form acid rain (H2SO4)

Question 15

Effects of acid rain

Answer 15

Damages plants, marble buildings, metal works, increases acidity of rivers/ decreases PH of rivers