Cu + 2 NO₃^- + 4 H₃O⁺ → (Cu)²⁺ + 2 NO₂ + 6 H₂O

This is an oxidation-reduction (redox) reaction:

Cu is a reducing agent, NO₃^- is an oxidizing agent.

Reactants:

• 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.
• NO₃^- – Nitrate
  • Other names: Nitrate ion , NO3(-) , [NO3](-) ... show moreNitrate(1-) , NO3 , Trioxonitrate , Isosorbide Dinitrate , Gynazole-1 , Nitric acid , Sorbitrate , Trioxidonitrate , Ganite , Econazole Nitrate , Femstat 3 , Isordil , Nitrooxidane show less
• H₃O⁺
  • Names: Hydronium , Hydroxonium , H3O(+) ... show more[OH3](+) , Hydronium cation , Hydronium ion , Oxonium , Hydrogen , Proton , Oxidanium , H3O , Hydrated proton , Hydrated hydron , Protonated water show less

Products:

• Cu²⁺
• NO₂ – Nitrogen dioxide
  • Other names: Nitrogen(IV) oxide , Deutoxide of nitrogen , Nitrogen peroxide ... show moreNO2 , NO2(.) , Dinitrogen tetroxide (see notes) , Nitrogen tetroxide , Dinitrogen tetroxide show less
  • Appearance: Brown gas ; Reddish-brown gas or brown or yellow liquid with pungent odour ; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.]
• 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