30 FeCl2 + 6 HNO3 + 15 H2SO4 → 20 FeCl3 + 3 N2 + 5 Fe2(SO4)3 + 18 H2O
This is an oxidation-reduction (redox) reaction:
6 NV + 30 e- → 6 N0 (reduction)
30 FeII - 30 e- → 30 FeIII (oxidation)
HNO3 is an oxidizing agent, FeCl2 is a reducing agent.
Reactants:
- FeCl2 – Iron(II) chloride , Iron dichloride
- 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.]
- H2SO4 – Sulfuric acid
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