2 As2S3 + 11 HNO3 + 2 H2O → H3As4 + 6 H2SO4 + 11 NO
This is an oxidation-reduction (redox) reaction:
4 AsIII + 15 e- → 4 As-3/4 (reduction)
6 S-II - 48 e- → 6 SVI (oxidation)
11 NV + 33 e- → 11 NII (reduction)
As2S3 is an oxidizing agent, As2S3 is a reducing agent, HNO3 is an oxidizing agent.
Reactants:
- As2S3 – Arsenic trisulfide
- 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.]
- H2O – Water, oxidane
Products: