2 As + 3 S As2S3

This is an oxidation-reduction (redox) reaction:

2 As0 - 6 e- 2 AsIII (oxidation)

3 S0 + 6 e- 3 S-II (reduction)

As is a reducing agent, S is an oxidizing agent.

Reactants:

  • As
    • Names: Arsenic source: ICSC, accessed: 2019-09-04, Grey arsenic source: ICSC, accessed: 2019-09-04
    • Appearance: Brittle grey metallic-looking crystals source: ICSC, accessed: 2019-09-04
  • 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

Products:

  • As2S3Arsenic trisulfide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Arsenic(III) sulfide source: wikipedia, accessed: 2019-09-27
    • Appearance: Orange crystals source: wikipedia, accessed: 2019-09-27