2 Cr(OH)3 + 3 Ag2O + 4 NaOH 6 Ag + 2 Na2CrO4 + 5 H2O

This is an acid-base reaction (neutralization): Cr(OH)3 is an acid, NaOH is a base.

This is an oxidation-reduction (redox) reaction:

6 AgI + 6 e- 6 Ag0 (reduction)

2 CrIII - 6 e- 2 CrVI (oxidation)

Ag2O is an oxidizing agent, Cr(OH)3 is a reducing agent.

Reactants:

  • Cr(OH)3Chromium(3+) hydroxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Other names: Chromium(III) hydroxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Chromium (iii) hydroxide hydrate source: ICSC, accessed on: 2019-09-04, Cr(OH)3 source: wikidata, accessed on: 2019-09-02, Chromic (III) hydroxide hydrate source: ICSC, accessed on: 2019-09-04
    • Appearance: Green, gelatinous precipitate source: wikipedia, accessed on: 2019-09-27; Blue-to-green powder or black particles source: ICSC, accessed on: 2019-09-04
  • Ag2OSilver(I) oxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Other names: Silver oxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Silver rust source: wikipedia, accessed on: 2019-09-27, Argentous oxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02, Silver monoxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02
    • Appearance: Black/ brown cubic crystals source: wikipedia, accessed on: 2019-09-27
  • NaOH
    • Names: Sodium hydroxide source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Caustic soda source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Lye source: wikidata, accessed on: 2019-09-02
    • Appearance: White, waxy, opaque crystals source: wikipedia, accessed on: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed on: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed on: 2019-09-02

Products:

  • Ag
    • Names: Silver source: wikidata, accessed on: 2019-09-07source: ICSC, accessed on: 2019-09-04, Ag source: wikidata, accessed on: 2019-09-07, Element 47 source: wikidata, accessed on: 2019-09-07
    • Appearance: White metal. turns dark on exposure to ozone, hydrogen sulfide or sulfur source: ICSC, accessed on: 2019-09-04
  • Na2CrO4Sodium chromate source: wikipedia, accessed on: 2019-09-27source: wikidata, accessed on: 2019-09-02source: ICSC, accessed on: 2019-09-04
    • Other names: Chromic acid source: wikipedia, accessed on: 2019-09-27, (Na2CrO4) source: wikipedia, accessed on: 2019-09-27, Disodium salt source: wikipedia, accessed on: 2019-09-27
    • Appearance: Yellow crystals source: wikipedia, accessed on: 2019-09-27; Yellow hygroscopic crystals source: ICSC, accessed on: 2019-09-04
  • H2OWater, oxidane source: wikipedia, accessed on: 2019-09-27
    • Other names: Water (H2O) source: wikipedia, accessed on: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed on: 2019-09-27, Hydrogen oxide source: wikipedia, accessed on: 2019-09-27
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed on: 2019-09-27