Se + 2 Cl2 + 3 H2O → H2SeO3 + 4 HCl
This is an oxidation-reduction (redox) reaction:
Se0 - 4 e- → SeIV (oxidation)
4 Cl0 + 4 e- → 4 Cl-I (reduction)
Se is a reducing agent, Cl2 is an oxidizing agent.
Reactants:
Products:
- H2SeO3 – Selenous acid
, Selenic(IV) acid
- 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