Al2S3 + 12 HNO3 → 2 Al(NO3)3 + 6 NO2 + 6 H2O + 3 S

This is an oxidation-reduction (redox) reaction:

3 S-II - 6 e- → 3 S0 (oxidation)

6 NV + 6 e- → 6 NIV (reduction)

Al2S3 is a reducing agent, HNO3 is an oxidizing agent.

Reactants:

  • Al2S3
    • Names: Aluminium sulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Aluminum sulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Aluminium sulphide source: wikidata, accessed: 2019-09-02
    • Appearance: Gray solid source: wikipedia, accessed: 2019-09-27
  • HNO3 – Nitric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Aqua fortis source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Spirit of niter source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Eau forte source: wikipedia, accessed: 2019-09-27
    • Appearance: Colorless, yellow or red fuming liquid source: wikipedia, accessed: 2019-09-27; Colourless-to-yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; 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.] source: NIOSH NPG, accessed: 2019-09-02

Products:

  • Al(NO3)3 – Aluminium nitrate source: wikipedia, accessed: 2019-09-27
    • Other names: Nitric Aluminum salt source: wikipedia, accessed: 2019-09-27, Aluminum nitrate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Aluminium(III) nitrate source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystals, solid | hygroscopic source: wikipedia, accessed: 2019-09-27
  • NO2 – Nitrogen dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Nitrogen(IV) oxide source: wikipedia, accessed: 2019-09-27, Deutoxide of nitrogen source: wikipedia, accessed: 2019-09-27, Nitrogen peroxide source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: Brown gas source: wikipedia, accessed: 2019-09-27; Reddish-brown gas or brown or yellow liquid with pungent odour source: ICSC, accessed: 2019-09-04; 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.] source: NIOSH NPG, accessed: 2019-09-02
  • H2O – Water, oxidane source: wikipedia, accessed: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27
  • S
    • Names: Sulfur source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, S source: wikidata, accessed: 2019-09-07, Sulphur source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04
    • Appearance: Yellow solid in various forms source: ICSC, accessed: 2019-09-04