Fuming Sulfuric Acid Is Obtained by the Addition of SO₃

question 45

Multiple Choice

Fuming sulfuric acid is obtained by the addition of SO₃ to concentrated H₂SO₄. The fumes result from the reaction of SO₃ gas with water vapor. What is the product when one molecule of SO₃ reacts with one molecule of water?

• A)two molecules of sulfurous acid
• B)one sulfate ion
• C)two sulfite ions
• D)one molecule of sulfuric acid
• E)two molecules of sulfuric acid

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