FeS + 10 HNO3 → Fe(NO3)3 + SO2 + 7 NO2 + 5 H2O
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FeS+10HNO3→Fe(NO3)3+SO2+7NO2+5H2O
This is an oxidation-reduction (redox) reaction:
S-II-6e-→SIV(oxidation)
7NV+7e-→7NIV(reduction)
FeII-1e-→FeIII(oxidation)
FeS is a reducing agent, HNO3 is an oxidizing agent, FeS is a reducing agent.
Reactants:
- FeS
- Names: Iron(II) sulfide , Iron sulfide , Ferrous sulfide ... show more show less
- Appearance: Gray, sometimes in lumps or powder
- HNO3 – Nitric acid
- Other names: Aqua fortis , Spirit of niter , Eau forte ... show more show less
- 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:
- Fe(NO3)3 – Iron(III) nitrate
- Other names: Ferric nitrate , Nitric acid , Iron(3+) salt , Iron (III) nitrate
- Appearance: Pale violet crystals | hygroscopic
- SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride ... show more show less
- Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]
- NO2 – Nitrogen dioxide
- Other names: Nitrogen(IV) oxide , Deutoxide of nitrogen , Nitrogen peroxide ... show more show less
- Appearance: Brown gas ; Reddish-brown gas or brown or yellow liquid with pungent odour ; Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.]
- H2O – Water, oxidane
- Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show more show less
- Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
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