3 NO- + 2 Cr2O72- + 16 H+ → 4 (Cr)3+ + 3 NO3- + 8 H2O

This is an oxidation-reduction (redox) reaction:

3 NI - 12 e- → 3 NV (oxidation)

4 CrVI + 12 e- → 4 CrIII (reduction)

NO- is a reducing agent, Cr2O72- is an oxidizing agent.

Reactants:

  • NO-
  • Cr2O72-
  • 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
  • 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