3 PbO2 + Cr2(SO4)3 + 2 H2O → 2 H2CrO4 + 3 PbSO4

This is an oxidation-reduction (redox) reaction:

3 PbIV + 6 e- → 3 PbII (reduction)

2 CrIII - 6 e- → 2 CrVI (oxidation)

PbO2 is an oxidizing agent, Cr2(SO4)3 is a reducing agent.

Reactants:

  • PbO2 – Lead(IV) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Lead dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Plumbic oxide source: wikipedia, accessed: 2019-09-27, Plattnerite source: wikipedia, accessed: 2019-09-27, Lead peroxide source: ICSC, accessed: 2019-09-04
    • Appearance: Dark-brown, black powder source: wikipedia, accessed: 2019-09-27; Brown crystals or powder source: ICSC, accessed: 2019-09-04
  • 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

Products:

  • H2CrO4 – Chromic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Dihydroxidodioxidochromium source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Chromic(VI) acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Tetraoxochromic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Sternochromicmaxidochorodium source: wikidata, accessed: 2019-09-02
  • PbSO4 – Lead(II) sulfate source: wikipedia, accessed: 2019-09-27
    • Other names: Anglesite source: wikipedia, accessed: 2019-09-27, Fast white source: wikipedia, accessed: 2019-09-27, Milk white source: wikipedia, accessed: 2019-09-27
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27