H₂O₂ (aq) + Cu (s) + 2 HCl (aq) → CuCl₂ (aq) + 2 H₂O (l)

This is an oxidation-reduction (redox) reaction:

Cu is a reducing agent, H₂O₂ is an oxidizing agent.

Reactants:

• H₂O₂ – Hydrogen peroxide
  • Other names: Dioxidane , Oxidanyl , Perhydroxic acid ... show more0-hydroxyol , Dihydrogen dioxide , Oxygenated water , Peroxaan , Hydrogen peroxide (>60% solution in water) , H2O2 , Peroxide , Hydroperoxide , Hydrogen dioxide , High-strength hydrogen peroxide , Hydrogen peroxide (aqueous) show less
  • Appearance: Very light blue color; colorless in solution ; Colourless liquid ; Colorless liquid with a slightly sharp odor. [Note: The pure compound is a crystalline solid below 12°F. Often used in an aqueous solution.]
• 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.]

Products:

• 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)
• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas