3 NaNO3 + 8 NaOH + 2 Cr2O3 3 NaNO + 4 Na2CrO4 + 4 H2O

This is an oxidation-reduction (redox) reaction:

3 NV + 12 e- 3 NI (reduction)

4 CrIII - 12 e- 4 CrVI (oxidation)

NaNO3 is an oxidizing agent, Cr2O3 is a reducing agent.

Reactants:

  • NaNO3Sodium nitrate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04
    • Other names: Peru saltpeter source: wikipedia, accessed on: 2019-09-27, Soda niter source: wikipedia, accessed on: 2019-09-27, Cubic niter source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: White powder or colorless crystals source: wikipedia, accessed on: 2019-09-27; Colourless hygroscopic crystals source: ICSC, accessed on: 2019-09-04
  • NaOH
    • Names: Sodium hydroxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Caustic soda source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Lye source: wikidata, accessed on: 2019-09-02
    • Appearance: White, waxy, opaque crystals source: wikipedia, accessed on: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed on: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed on: 2019-09-02
  • Cr2O3
    • Names: Chromium(III) oxide source: wikipedia, accessed on: 2019-09-27, Chromium sesquioxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Chromia source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: Light to dark green, fine crystals source: wikipedia, accessed on: 2019-09-27; Light-to-dark-green powder source: ICSC, accessed on: 2019-09-04

Products:

  • NaNO
  • Na2CrO4Sodium chromate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04
    • Other names: Chromic acid source: wikipedia, accessed on: 2019-09-27, (Na2CrO4) source: wikipedia, accessed on: 2019-09-27, Disodium salt source: wikipedia, accessed on: 2019-09-27
    • Appearance: Yellow crystals source: wikipedia, accessed on: 2019-09-27; Yellow hygroscopic crystals source: ICSC, accessed on: 2019-09-04
  • H2OWater, oxidane source: wikipedia, accessed on: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed on: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed on: 2019-09-27, Hydrogen oxide source: wikipedia, accessed on: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed on: 2019-09-27