2 KClO3 + 3 S → 2 KCl + 3 SO2 – Balanced equation

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This is an oxidation-reduction (redox) reaction:

3 S - 12 e^- → 3 S^IV (oxidation)

2 Cl^V + 12 e^- → 2 Cl^-I (reduction)

S is a reducing agent, KClO₃ is an oxidizing agent.

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Reactants:

KClO₃
- Names: Potassium chlorate , Potassium chlorate(V) , Potcrate , Potassium oxymuriate
- Appearance: White crystals or powder ; Colourless crystals or white powder
S
- Names: Sulfur , S , Sulphur
- Appearance: Yellow solid in various forms

Products:

KCl
- Names: Potassium chloride , Sylvite , Muriate of potash
- Appearance: White crystalline solid ; Colourless hygroscopic crystals
SO₂ – Sulfur dioxide
- Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride
- Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]