CuCl₂ (aq) + H₂ (g) → Cu (s) + 2 HCl (aq)

This is an oxidation-reduction (redox) reaction:

CuCl₂ is an oxidizing agent, H₂ is a reducing agent.

Reactants:

• CuCl₂
  • Names: Copper(II) chloride , Cupric chloride , Copper chloride ... show moreCopper(2+) chloride , Cupric chloride anhydrous , Coclor , Copper(II) chloride (1:2) , Copper chloride (CuCl2) , Cupric dichloride , Copper(2+)chloride , Copper dichloride , Copper bichloride , CuCl2 , Cupric Chloride show less
  • Appearance: Yellow-brown solid (anhydrous) | blue-green solid (dihydrate)
• H₂
  • Names: Dihydrogen , Hydrogen , H2 ... show moreH₂ , Molecular hydrogen gas , Hydrogen gas , Hydrogen molecule , Molecular hydrogen show less
  • Appearance: Odourless colourless compressed gas

Products:

• Cu
  • Names: Copper , Copper (dusts and mists, as Cu) , Cu ... show moreCU-7 , Tatum-T , Paragard T 380A , Element 29 , Cuprum , Copper metal dusts , Copper metal fumes show less
  • Appearance: Solid in various forms. turns green on exposure to moist air ; Reddish, lustrous, malleable, odorless solid.
• HCl – Chlorane , Hydrogen chloride
  • Other names: Hydrochloric acid , M , Uriatic acid ... show moreHydronium chloride , Chlorhydric Acid , Hydrochloric acid gas , HCl , Anhydrous hydrogen chloride , Hydrochloric acid, anhydrous , Aqueous hydrogen chloride , [Note: Often used in an aqueous solution.] show less
  • 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.]