H2NO3 + HgS + 2 HCl → HgCl2 + S + NO + 2 H2O
This is an oxidation-reduction (redox) reaction:
S-II - 2 e- → S0 (oxidation)
NIV + 2 e- → NII (reduction)
HgS is a reducing agent, H2NO3 is an oxidizing agent.
Reactants:
- H2NO3
- 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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