3 C4H10O (aq) + CrO3 (aq) → 3 C4H8O (aq) + Cr (s) + 3 H2O (l)

This is an oxidation-reduction (redox) reaction:

12 C-II - 6 e- → 12 C-3/2 (oxidation)

CrVI + 6 e- → Cr0 (reduction)

C4H10O is a reducing agent, CrO3 is an oxidizing agent.

This is a precipitation reaction: Cr is the formed precipitate.

Reactants:

  • C4H10O – Ethoxyethane source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Diethyl ether source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Diethyl ether; Dether; Ethyl ether; Ethyl oxide; 3-Oxapentane; Ethoxyethane; Diethyl oxide; Solvent ether; Sulfuric ether source: wikipedia, accessed: 2019-09-27, Ether source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Colorless liquid source: wikipedia, accessed: 2019-09-27; Very volatile colourless liquid with characteristic odour source: ICSC, accessed: 2019-09-04; Colorless liquid with a pungent, sweetish odor. [Note: A gas above 94°F.] source: NIOSH NPG, accessed: 2019-09-02
  • CrO3 – Chromium trioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Chromic anhydride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Chromium(VI) oxide source: wikipedia, accessed: 2019-09-27, Chromic acid (misnomer) source: wikipedia, accessed: 2019-09-27
    • Appearance: Dark red granular solid, deliquescent source: wikipedia, accessed: 2019-09-27; Odourless dark red deliquescent crystals, flakes or granular powder source: ICSC, accessed: 2019-09-04

Products:

  • C4H8O – Oxolane source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, 1,4-Epoxybutane source: wikipedia, accessed: 2019-09-28source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Oxacyclopentane source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Tetrahydrofuran source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Butylene oxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Cyclotetramethylene oxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless liquid source: wikipedia, accessed: 2019-09-28; Colourless liquid with characteristic odour source: ICSC, accessed: 2019-09-04; Colorless liquid with an ether-like odor. source: NIOSH NPG, accessed: 2019-09-02
  • Cr
    • Names: Chromium source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Chromium metal source: NIOSH NPG, accessed: 2019-09-02, Cr source: wikidata, accessed: 2019-09-07
    • Appearance: Grey powder source: ICSC, accessed: 2019-09-04; Blue-white to steel-gray, lustrous, brittle, hard, odorless solid. source: NIOSH NPG, accessed: 2019-09-02
  • 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