2 K(Cr(OH)4) + 3 H2O2 + 2 KOH 2 K2CrO4 + 8 H2O

This is an oxidation-reduction (redox) reaction:

2 CrIII - 6 e- 2 CrVI (oxidation)

6 O-I + 6 e- 6 O-II (reduction)

K(Cr(OH)4) is a reducing agent, H2O2 is an oxidizing agent.

Reactants:

  • K(Cr(OH)4)
  • H2O2Hydrogen peroxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: NIOSH NPG, accessed on: 2019-09-02
    • Other names: Dioxidane source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Oxidanyl source: wikipedia, accessed on: 2019-09-27, Perhydroxic acid source: wikipedia, accessed on: 2019-09-27
    • Appearance: Very light blue color; colorless in solution source: wikipedia, accessed on: 2019-09-27; Colourless liquid source: ICSC, accessed on: 2019-09-04; Colorless liquid with a slightly sharp odor. [Note: The pure compound is a crystalline solid below 12°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed on: 2019-09-02
  • 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:

  • 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