2 HCl (aq) + Cd (s) → H2 (g) + CdCl2 (aq)
This is an oxidation-reduction (redox) reaction:
Cd0 - 2 e- → CdII (oxidation)
2 HI + 2 e- → 2 H0 (reduction)
Cd 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.]