6 (Br)- + (Cr2O7)2- + 14 H+ 2 (Cr)3+ + 7 H2O + 3 Br2

This is an oxidation-reduction (redox) reaction:

6 Br-I - 6 e- 6 Br0 (oxidation)

2 CrVI + 6 e- 2 CrIII (reduction)

Br- is a reducing agent, (Cr2O7)2- is an oxidizing agent.

Reactants:

  • Br-
  • (Cr2O7)2-
  • H+

Products:

  • Cr3+
  • 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
  • Br2
    • Names: Bromine source: ICSC, accessed on: 2019-09-04source: NIOSH NPG, accessed on: 2019-09-02, Molecular bromine source: NIOSH NPG, accessed on: 2019-09-02
    • Appearance: Fuming red-to-brown liquid with pungent odour source: ICSC, accessed on: 2019-09-04; Dark reddish-brown, fuming liquid with suffocating, irritating fumes. source: NIOSH NPG, accessed on: 2019-09-02