8 HCl (aq) + 7 KI (aq) + KIO4 (s) → 4 I2 (s) + 8 KCl (aq) + 4 H2O (l)
This is an oxidation-reduction (redox) reaction:
7 I-I - 7 e- → 7 I0 (oxidation)
IVII + 7 e- → I0 (reduction)
KI is a reducing agent, KIO4 is an oxidizing agent (synproportionation (comproportionation)).
Reactants:
- 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.]
- KI
- KIO4 – Potassium periodate
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