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Difficulty: EasyTetraoxosulfate(VI) Acid: Contact Process and Properties

When concentrated tetraoxosulfate(VI) acid (H2SO4H_2SO_4) is added to sucrose crystals, a black mass of carbon and steam are produced. What property of the acid does this reaction demonstrate?

  1. Dehydrating actionAnswer
  2. B
    Oxidizing action
  3. C
    Reducing action
  4. D
    Precipitating action

Answer

Dehydrating action
Concentrated tetraoxosulfate(VI) acid has a very high affinity for water. When added to carbohydrates such as sucrose (C12H22O11C_{12}H_{22}O_{11}), it removes hydrogen and oxygen atoms in a 2:1 ratio as water molecules, leaving behind a charred black mass of elemental carbon.

Step-by-Step Solution

1
Analyze the chemical transformation in the given reaction
Sucrose (C12H22O11C_{12}H_{22}O_{11}) reacts with concentrated H2SO4H_2SO_4 to yield elemental carbon (12C12C) and water vapor (11H2O11H_2O).
The acid extracts hydrogen and oxygen in the exact ratio of water from the carbohydrate molecule.
2
Identify the specific property corresponding to removing elements of water
This process is classified as dehydration.
Dehydration refers specifically to the removal of chemically combined water or its constituent elements from a substance.

Key Concept

Dehydrating action of concentrated tetraoxosulfate(VI) acid
Estimated Time:45s
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Topics

Tetraoxosulfate(VI) Acid: Contact Process and Properties

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