Pollution Equations

Question 1

Calcium oxide formation

Answer 1

CaCO3—> CaO + CO2

Question 2

Suspension of limestone in water

Answer 2

CaCO3 + SO2 —-> CaSO3 + CO2

Question 3

Incomplete combustion of petrol

Answer 3

C8H18 + 8.5O2 —-> 8CO + 9H2O

Question 4

Sulphurous acid formation

Answer 4

SO2 + H2O —-> H2SO3

Question 5

Converter reactions of unburned hydrocarbons and nitrogen monoxide

Answer 5

C8H18 + 25NO —-> 8CO2 + 12.5N2 + 9H2O

Question 6

Nitrogen monoxide formation

Answer 6

N2 + O2 —-> 2NO

Question 7

Sulphur trioxide formation

Answer 7

2SO2 + O2 —-> 2SO3

Question 8

Converter reactions with CO and nitrogen monoxide

Answer 8

2CO + 2NO —-> 2CO2 + N2

Question 9

Example of a hydrocarbon containing a sulphur impurity

Answer 9

CH3SH + 3O2 —-> CO2 + 2H2O + SO2

Question 10

Nitrogen dioxide formation

Answer 10

2NO + O2 —-> 2NO2

Question 11

Nitric acid formation

Answer 11

4NO2 + O2 + 2H2O —-> 4HNO3

Question 12

Sulphuric acid formation

Answer 12

SO3 + H2O —-> H2SO4

Question 13

Sulphur dioxide formation

Answer 13

S + O2 —-> SO2

Question 14

Gypsum/ calcium sulphite

Answer 14

(CaCO3 . 2H2O)