6 Na2S2O3 + KIO3 + 6 HCl → 3 Na2S4O6 + KI + 6 NaCl + 3 H2O
This is an oxidation-reduction (redox) reaction:
12 SII - 6 e- → 12 S5/2 (oxidation)
IV + 6 e- → I-I (reduction)
Na2S2O3 is a reducing agent, KIO3 is an oxidizing agent.
Reactants:
- Na2S2O3
- KIO3 – Potassium iodate
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
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