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CHEMISTRY · 9 EXPLORATION STEPS

Sulfur, SO₂ and sulfuric acid

The element is still sulfur. Why is it sometimes a yellow solid, sometimes associated with decolourizing fuchsin solution, and sometimes combined with iron powder?

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Simulation: Sulfur, SO₂ and sulfuric acid▶ Open 3D simulation
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  1. 01

    All equipment

  2. 02

    Sulfur powder + iron powder

  3. 03

    Concentrated sulfuric acid and copper

  4. 04

    Concentrated or dilute?

  5. 05

    Heat to restore colour

  6. 06

    Three tests and cotton absorbers

  7. 07

    Converge to oxidation state 0

  8. 08

    Inside view · Oxidation-state ladder

  9. 09

    Assessment · Complete decolourisation

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