3 Na2S2O5 + 6 CuSO4*5H2O + 10 NaOH 2 Cu3(SO3)2*2H2O + 8 Na2SO4 + 31 H2O

This is an oxidation-reduction (redox) reaction:

6 CuII + 4 e- 6 Cu4/3 (reduction)

2 SIV - 4 e- 2 SVI (oxidation)

CuSO4*5H2O is an oxidizing agent, Na2S2O5 is a reducing agent.

Reactants:

  • Na2S2O5
    • Names: Sodium metabisulfite source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium pyrosulfite source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02, Sodium disulfite source: wikipedia, accessed: 2019-09-28source: ICSC, accessed: 2019-09-04
    • Appearance: White to yellow powder source: wikipedia, accessed: 2019-09-28; White powder source: ICSC, accessed: 2019-09-04; White to yellowish crystals or powder with an odor of sulfur dioxide. source: NIOSH NPG, accessed: 2019-09-02
  • CuSO4*5H2O
    • Names: Copper(II) sulfate pentahydrate source: wikidata, accessed: 2019-09-03, Copper(ii) sulfate, pentahydrate source: ICSC, accessed: 2019-09-04, Cupric sulfate pentahydrate source: wikidata, accessed: 2019-09-03
    • Appearance: Blue solid in various forms source: ICSC, accessed: 2019-09-04
  • NaOH
    • Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02
    • Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02

Products:

  • Cu3(SO3)2*2H2O
  • Na2SO4
    • Names: Sodium sulfate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Sodium sulphate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Sulfate of sodium source: wikipedia, accessed: 2019-09-27
    • Appearance: White crystalline solid | hygroscopic source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04
  • H2OWater, 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