NNO3 + HgS + 2 HCl → HgCl2 + S + 2 NO + H2O
This is an oxidation-reduction (redox) reaction:
S-II - 2 e- → S0 (oxidation)
2 NIII + 2 e- → 2 NII (reduction)
Reactants:
- NNO3
- HgS – Mercury sulfide
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
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