2 Cr + 3 CuCl2 2 CrCl3 + 3 Cu

This is an oxidation-reduction (redox) reaction:

3 CuII + 6 e- 3 Cu0 (reduction)

2 Cr0 - 6 e- 2 CrIII (oxidation)

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

Reactants:

  • Cr
    • Names: Chromium source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Chromium metal source: NIOSH NPG, accessed: 2019-09-02, Cr source: wikidata, accessed: 2019-09-07
    • Appearance: Grey powder source: ICSC, accessed: 2019-09-04; Blue-white to steel-gray, lustrous, brittle, hard, odorless solid. source: NIOSH NPG, accessed: 2019-09-02
  • CuCl2
    • Names: Copper(II) chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Cupric chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Copper chloride source: wikidata, accessed: 2019-09-02
    • Appearance: Yellow-brown solid (anhydrous) | blue-green solid (dihydrate) source: wikipedia, accessed: 2019-09-27

Products:

  • CrCl3Chromium(III) chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Chromium trichloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Chromic chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Chromium(iii) chloride (anhydrous) source: ICSC, accessed: 2019-09-04, Chromium(3+) trichloride source: wikidata, accessed: 2019-09-02
    • Appearance: Purple (anhydrous), dark green (hexahydrate) source: wikipedia, accessed: 2019-09-27; Violet crystals source: ICSC, accessed: 2019-09-04
  • 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