A Levels Chemistry

When coal is burnt, gaseous oxides of carbon and sulphur are formed which pollute the
atmosphere. One method of preventing such pollution involves adding calcium carbonate to the
burning coal. The temperature of the process causes the decomposition of the calcium carbonate
into calcium oxide.
Which reactions will be important in helping to reduce atmospheric pollution?
1
Calcium oxide reacts with sulphur dioxide to form calcium sulphite.
2
Calcium oxide reacts with sulphur dioxide and more air to form calcium sulphate.
3
Calcium oxide reacts with carbon monoxide to form calcium carbonate.


Oxides of Nitrogen and Sulfur, Uses of Group 2 Compounds | 2004 - M/J - 9701/1 | Q35