3 Li2SO3 + Li2Cr2O7 + 4 H2SO4 → 4 Li2SO4 + Cr2(SO4)3 + 4 H2O

This is an oxidation-reduction (redox) reaction:

3 SIV - 6 e- → 3 SVI (oxidation)

2 CrVI + 6 e- → 2 CrIII (reduction)

Li2SO3 is a reducing agent, Li2Cr2O7 is an oxidizing agent.

Reactants:

  • Li2SO3 – Lithium sulfite source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-03
    • Li2Cr2O7
      • Names: Lithium dichromate source: wikidata, accessed: 2019-09-03
    • H2SO4 – Sulfuric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: NIOSH NPG, accessed: 2019-09-02
      • Other names: Oil of vitriol source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Sulfuric acid, concentrated (> 51% and < 100%) source: ICSC, accessed: 2019-09-04, H2SO4 source: wikidata, accessed: 2019-09-07
      • Appearance: Clear, colorless liquid source: wikipedia, accessed: 2019-09-27; Odourless colourless oily hygroscopic liquid source: ICSC, accessed: 2019-09-04; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.] source: NIOSH NPG, accessed: 2019-09-02

    Products:

    • Li2SO4 – Lithium sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
      • Other names: Lithium sulphate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Li2SO4 source: wikidata, accessed: 2019-09-02, Lithiophor source: wikidata, accessed: 2019-09-02, Dilthium sulfate source: wikidata, accessed: 2019-09-02
      • Appearance: White crystalline solid, hygroscopic source: wikipedia, accessed: 2019-09-27
    • Cr2(SO4)3 – Chromium(III) sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
      • Other names: Basic chromium sulfate source: wikipedia, accessed: 2019-09-27, Chromic sulfate source: wikipedia, accessed: 2019-09-27
      • Appearance: Reddish-brown crystals (anhydrous), purple crystals (hydrated) source: wikipedia, accessed: 2019-09-27
    • 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