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CGP GCSE Chem > The Contact Process is Used to Make Sulfuric Acid > Flashcards

The Contact Process is Used to Make Sulfuric Acid Flashcards

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1
Q

What does the first stage of the contact process involve?

A

Forming Sulfur dioxide gas - done by burning Sulfur in air or roasting ores
S + O2 —> SO2

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2
Q

What is then done to the Sulfur dioxide to form?

A

Oxidised to form Sulfur trioxide

2SO2 + O2 —> 2SO3

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3
Q

What is done to the Sulfur trioxide to form?

A

Dissolved in concentrated sulfuric acid to form liquid oleum

SO3 + H2SO4 —> H2S2O7

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4
Q

What is done last to the oleum to form?

A

Oleum is diluted with measured amounts of water to form concentrated sulfuric acid
H2S2O7 + H2O —> 2H2SO4

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CGP GCSE Chem (233 decks)

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