AgBr + 2 Na2S2O3 → Na3[Ag(S2O3)2] + NaBr

This is a complexation reaction: Na3[Ag(S2O3)2] is the formed complex.

Reactants:

  • AgBr
    • Names: Silver bromide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Bromargyrite source: wikipedia, accessed: 2019-09-28, Bromyrite source: wikipedia, accessed: 2019-09-28
    • Appearance: Pale yellow solid | photosensitive source: wikipedia, accessed: 2019-09-28
  • Na2S2O3
    • Names: Sodium thiosulfate source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium hyposulfite source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Hyposulphite of soda source: wikipedia, accessed: 2019-09-28
    • Appearance: White crystals source: wikipedia, accessed: 2019-09-28; Colourless crystals source: ICSC, accessed: 2019-09-04

Products:

  • Na3[Ag(S2O3)2]
  • NaBr – Sodium bromide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Bromide salt of sodium source: wikidata, accessed: 2019-09-02, Trisodium tribromide source: wikidata, accessed: 2019-09-02, NaBr source: wikidata, accessed: 2019-09-02
    • Appearance: White powder, hygroscopic source: wikipedia, accessed: 2019-09-27