3 PbCO3 + KNO3 → Pb3O4 + KNO2 + 3 CO2

This is an oxidation-reduction (redox) reaction:

3 PbII - 2 e- → 3 Pb8/3 (oxidation)

NV + 2 e- → NIII (reduction)

PbCO3 is a reducing agent, KNO3 is an oxidizing agent.

Reactants:

  • PbCO3 – Lead(II) carbonate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Lead carbonate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Cerussite source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Carbonic acid, lead(2+) salt source: ICSC, accessed: 2019-09-04, Lead(2+) carbonate source: ICSC, accessed: 2019-09-04
    • Appearance: White powder source: wikipedia, accessed: 2019-09-27; Colourless crystals source: ICSC, accessed: 2019-09-04
  • KNO3 – Potassium nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
    • Other names: Saltpeter source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Saltpetre source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Nitrate of potash source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Appearance: White solid source: wikipedia, accessed: 2019-09-27; Colourless-to-white crystalline powder source: ICSC, accessed: 2019-09-04

Products:

  • Pb3O4 – Lead tetroxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04
    • Other names: Lead(II,IV) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Minium source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Red lead source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04
    • Appearance: Vivid orange crystals source: wikipedia, accessed: 2019-09-27; Red crystals or powder source: ICSC, accessed: 2019-09-04
  • KNO2
    • Names: Potassium nitrite source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Nitrous acid potassium salt source: ICSC, accessed: 2019-09-04
    • Appearance: White or slight yellow solid | deliquescent source: wikipedia, accessed: 2019-09-27; White-to-yellow deliquescent solid in various forms source: ICSC, accessed: 2019-09-04
  • CO2
    • Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, {{plainlist| source: wikipedia, accessed: 2019-09-27, CO2 source: wikidata, accessed: 2019-09-02
    • Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] source: NIOSH NPG, accessed: 2019-09-02