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.

Reactants:

  • HCl – Chlorane source: wikipedia, accessed: 2019-09-27, Hydrogen chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Hydrochloric acid source: wikipedia, accessed: 2019-09-27source: NIOSH NPG, accessed: 2019-09-02, M source: wikipedia, accessed: 2019-09-27, Uriatic acid source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless, transparent liquid, fumes in air if concentrated source: wikipedia, accessed: 2019-09-27; Colorless gas source: wikipedia, accessed: 2019-09-27; Colourless compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02
  • Cd
    • Names: Cadmium source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Cd source: wikidata, accessed: 2019-09-07, Element 48 source: wikidata, accessed: 2019-09-07, 48 source: wikidata, accessed: 2019-09-07
    • Appearance: Soft blue-white metal lumps or grey powder. malleable. turns brittle on exposure to 80°c. tarnishes on exposure to moist air source: ICSC, accessed: 2019-09-04

Products:

  • H2
    • Names: Dihydrogen source: wikidata, accessed: 2019-09-07, Hydrogen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, H2 source: wikidata, accessed: 2019-09-07
    • Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04
  • CdCl2 – Cadmium dichloride source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04
    • Other names: Cadmium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Cadmium(II) chloride source: wikipedia, accessed: 2019-09-27, CdCl2 source: wikidata, accessed: 2019-09-02
    • Appearance: White solid, hygroscopic source: wikipedia, accessed: 2019-09-27; Odourless colourless hygroscopic crystals source: ICSC, accessed: 2019-09-04