6 FeO (s) + 2 HNO3 (aq) → 3 Fe2O3 (s) + 2 NO (g) + H2O (l)
This is an acid-base reaction (neutralization): FeO is a base, HNO3 is an acid.
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, FeO is a reducing agent.
Reactants:
- FeO – Iron(II) oxide
- 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.]
Products:
- Fe2O3 – Iron(III) oxide
- Other names: Ferric oxide , Hematite , Ferric iron
- Appearance: Red-brown solid ; Reddish brown-to-black crystals or powder ; Reddish-brown solid. [Note: Exposure to fume may occur during the arc-welding of iron.] ; A fine, red powder of ferric oxide. [Note: Usually used in cake form or impregnated in paper or cloth.]
- NO – Nitrogen monoxide , Oxidonitrogen(•) (additive)
- H2O – Water, oxidane