2 HNO3 + 6 FeSO4 + 3 H2SO4 → 3 Fe2[SO4]3 + 2 NO + 4 H2O
This is a complexation reaction: Fe2[SO4]3 is the formed complex.
This is an oxidation-reduction (redox) reaction:
2 NV + 6 e- → 2 NII (reduction)
6 FeII - 6 e- → 6 FeIII (oxidation)
HNO3 is an oxidizing agent, FeSO4 is a reducing agent.
- 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.]
- FeSO4 – Iron(II) sulphate
- H2SO4 – Sulfuric acid
- NO – Nitrogen monoxide , Oxidonitrogen(•) (additive)
- H2O – Water, oxidane