Cu2O + 2 H+ → Cu + (Cu)2+ + H2O

This is an oxidation-reduction (redox) reaction:

CuI - 1 e- → CuII (oxidation)

CuI + e- → Cu0 (reduction)

Cu2O is both an oxidizing and a reducing agent (disproportionation (dismutation)).

Reactants:

  • Cu2O – Copper(I) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Cuprous oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Dicopper oxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Cuprite source: wikipedia, accessed: 2019-09-27
    • Appearance: Brownish-red solid source: wikipedia, accessed: 2019-09-27; Yellow, red or brown crystalline powder source: ICSC, accessed: 2019-09-04
  • H+

Products:

  • Cu
    • Names: Copper source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Copper (dusts and mists, as Cu) source: NIOSH NPG, accessed: 2019-09-02, Cu source: wikidata, accessed: 2019-09-07
    • Appearance: Solid in various forms. turns green on exposure to moist air source: ICSC, accessed: 2019-09-04; Reddish, lustrous, malleable, odorless solid. source: NIOSH NPG, accessed: 2019-09-02
  • Cu2+
  • H2O – Water, oxidane source: wikipedia, accessed: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27