3 FeS2 + 16 HNO3 → 3 FeNO3 + 13 NO + 6 H2SO4 + 2 H2O
This is an oxidation-reduction (redox) reaction:
6 S-I - 42 e- → 6 SVI (oxidation)
13 NV + 39 e- → 13 NII (reduction)
3 NV + 6 e- → 3 NIII (reduction)
3 FeII - 3 e- → 3 FeIII (oxidation)
FeS2 is a reducing agent, HNO3 is an oxidizing agent, HNO3 is an oxidizing agent, FeS2 is a reducing agent.
Reactants:
- FeS2
- 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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