MoS2 + 9 PbO2 + 14 HNO3 H2MoO4 + 2 PbSO4 + 7 Pb(NO3)2 + 6 H2O

This is an oxidation-reduction (redox) reaction:

MoIV - 2 e- MoVI (oxidation)

9 PbIV + 18 e- 9 PbII (reduction)

2 S-II - 16 e- 2 SVI (oxidation)

MoS2 is a reducing agent, PbO2 is an oxidizing agent, MoS2 is a reducing agent.

Reactants:

  • MoS2Molybdenum disulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Molybdenum(IV) sulfide source: wikipedia, accessed: 2019-09-27, [MoS2] source: wikidata, accessed: 2019-09-02, Molybdenum disulphide source: wikidata, accessed: 2019-09-02
    • Appearance: Black/lead-gray solid source: wikipedia, accessed: 2019-09-27
  • PbO2Lead(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
  • HNO3Nitric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Aqua fortis source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Spirit of niter source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Eau forte source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless, yellow or red fuming liquid source: wikipedia, accessed: 2019-09-27; Colourless-to-yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colorless, yellow, or red, fuming liquid with an acrid, suffocating odor. [Note: Often used in an aqueous solution. Fuming nitric acid is concentrated nitric acid that contains dissolved nitrogen dioxide.] source: NIOSH NPG, accessed: 2019-09-02

Products:

  • H2MoO4
    • Names: Molybdic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Molybdic(VI) acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, H2MoO4 source: wikidata, accessed: 2019-09-02, [MoO2(OH)2] source: wikidata, accessed: 2019-09-02
  • PbSO4Lead(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
  • Pb(NO3)2Lead(II) nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Lead nitrate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-02, Plumbous nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Lead dinitrate source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04
    • Appearance: White colourless crystals source: wikipedia, accessed: 2019-09-27; White or colourless crystals source: ICSC, accessed: 2019-09-04
  • H2OWater, 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