2 SeCl2 + 3 H2O → H2SeO3 + Se + 4 HCl
This is an oxidation-reduction (redox) reaction:
SeII + 2 e- → Se0 (reduction)
SeII - 2 e- → SeIV (oxidation)
SeCl2 is both an oxidizing and a reducing agent (disproportionation (dismutation)).
Reactants:
Products:
- H2SeO3 – Selenous acid , Selenic(IV) acid
- Se
- 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.]