3 K3AsS3 + 26 HNO3 → 3 K3AsO4 + 26 NO + 9 H2SO4 + 4 H2O
This is an oxidation-reduction (redox) reaction:
3 AsIII - 6 e- → 3 AsV (oxidation)
9 S-II - 72 e- → 9 SVI (oxidation)
26 NV + 78 e- → 26 NII (reduction)
K3AsS3 is a reducing agent, K3AsS3 is a reducing agent, HNO3 is an oxidizing agent.
Reactants:
- K3AsS3
- 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.]
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