4 Zn + 2 HCl → 2 Zn2Cl + H2
This is an oxidation-reduction (redox) reaction:
4 Zn0 - 2 e- → 4 Zn1/2 (oxidation)
2 HI + 2 e- → 2 H0 (reduction)
Zn is a reducing agent, HCl is an oxidizing agent.
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , Hydrochloric acid gas , HCl
- 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.]