CAIE IGCSE Chemistry 6.3.9 Sources of the sulfur dioxide (burning

Practise stating how Contact process reactants are obtained, from burning sulfur, roasting sulfide ores and using oxygen from air.

Exam points

describe sulfur dioxide production by burning sulfur in air or roasting sulfide ores
use zinc blende as a sulfide ore example and name sulfur dioxide as a roasting product
state air as the oxygen source for the Contact process when raw materials are tested

[Maximum number: 1]

Sulfuric acid can be manufactured from the raw materials sulfur, air and water. The process can be divided into four stages.
stage 1 converting sulfur into sulfur dioxide
stage 2 converting sulfur dioxide into sulfur trioxide
stage 3 converting sulfur trioxide into oleum, $\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$
stage 4 converting oleum into sulfuric acid
stage 1

Describe how sulfur is converted into sulfur dioxide.

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6.3.9—Sources of the sulfur dioxide (burning question 1