K2Cr2O7 + 6 KI + 14 HCl → 2 CrCl3 + 3 I2 + 8 KCl + 7 H2O
This is an oxidation-reduction (redox) reaction:
6 I-I - 6 e- → 6 I0 (oxidation)
2 CrVI + 6 e- → 2 CrIII (reduction)
KI is a reducing agent, K2Cr2O7 is an oxidizing agent.
Reactants:
- K2Cr2O7 – Potassium dichromate(VI)
- KI
- 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.]
- Other names: Hydrochloric acid
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