Cr2O72- + 3 NO2- + 8 H+ 2 (Cr)3+ + 3 NO3- + 4 H2O

This is an oxidation-reduction (redox) reaction:

3 NIII - 6 e- 3 NV (oxidation)

2 CrVI + 6 e- 2 CrIII (reduction)

NO2- is a reducing agent, Cr2O72- is an oxidizing agent.

Reactants:

  • Cr2O72-
  • NO2-Dioxidonitrate(1−) source: wikipedia, accessed: 2019-09-27
    • Other names: Nitrite source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07, Nitrite ion source: wikidata, accessed: 2019-09-07, NO2(-) source: wikidata, accessed: 2019-09-07
  • H+

Products:

  • Cr3+
  • NO3-Nitrate source: wikipedia, accessed: 2019-09-27
    • Other names: Nitrate ion source: wikidata, accessed: 2019-09-07, NO3(-) source: wikidata, accessed: 2019-09-07, [NO3](-) source: wikidata, accessed: 2019-09-07
  • H2OWater, 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