23 PbO2 + 4 MoS2 + 46 HNO3 → H2Mo4 + 8 H2SO4 + 23 Pb(NO3)2 + 14 H2O
This is an oxidation-reduction (redox) reaction:
23 PbIV + 46 e- → 23 PbII (reduction)
4 MoIV + 14 e- → 4 Mo1/2 (reduction)
8 S-II - 64 e- → 8 SVI (oxidation)
2 HI + 4 e- → 2 H-I (reduction)
PbO2 is an oxidizing agent, MoS2 is an oxidizing agent, MoS2 is a reducing agent, HNO3 is an oxidizing agent.
Reactants:
- PbO2 – Lead(IV) oxide
- MoS2 – Molybdenum disulfide
- HNO3 – Nitric acid
- Other names: Aqua fortis , Spirit of niter , Eau forte
- Appearance: Colorless, yellow or red fuming liquid ; Colourless-to-yellow liquid with pungent odour ; 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.]
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