CrO + 2 KNO3 + 2 KOH 2 KNO2 + K2CrO4 + H2O

This is an oxidation-reduction (redox) reaction:

2 NV + 4 e- 2 NIII (reduction)

CrII - 4 e- CrVI (oxidation)

KNO3 is an oxidizing agent, CrO is a reducing agent.

Reactants:

  • CrO
  • KNO3Potassium nitrate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04
    • Other names: Saltpeter source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04, Saltpetre source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Nitrate of potash source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed on: 2019-09-27; Colourless-to-white crystalline powder source: ICSC, accessed on: 2019-09-04
  • KOHPotassium 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
    • Other names: Caustic potash 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, Lye source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Potash lye source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: White solid, deliquescent source: wikipedia, accessed on: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed on: 2019-09-04; Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets. [Note: May be used as an aqueous solution.] source: NIOSH NPG, accessed on: 2019-09-02

Products:

  • KNO2
    • Names: Potassium nitrite source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04, Nitrous acid potassium salt source: ICSC, accessed on: 2019-09-04
    • Appearance: White or slight yellow solid | deliquescent source: wikipedia, accessed on: 2019-09-27; White-to-yellow deliquescent solid in various forms source: ICSC, accessed on: 2019-09-04
  • K2CrO4Potassium 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, (K2CrO4) source: wikipedia, accessed on: 2019-09-27, Dipotassium salt source: wikipedia, accessed on: 2019-09-27
    • Appearance: Yellow powder source: wikipedia, accessed on: 2019-09-27; Yellow 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