4 HNO3 + FeCl2 → 2 H2O + Cl2 + NO + Fe(NO3)3
This is an oxidation-reduction (redox) reaction:
2 Cl-I - 2 e- → 2 Cl0 (oxidation)
NV + 3 e- → NII (reduction)
FeII - 1 e- → FeIII (oxidation)
FeCl2 is a reducing agent, HNO3 is an oxidizing agent, FeCl2 is a reducing agent.
Reactants:
- 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.]
- FeCl2 – Iron(II) chloride , Iron dichloride
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