2 (NH4)2Cr2O7 (aq) → 2 Cr2O3 (s) + 4 NH3 (aq) + 3 O2 (g) + 2 H2O (l)
This is an oxidation-reduction (redox) reaction:
4 CrVI + 12 e- → 4 CrIII (reduction)
6 O-II - 12 e- → 6 O0 (oxidation)
(NH4)2Cr2O7 is an oxidizing agent, (NH4)2Cr2O7 is a reducing agent.
This is a precipitation reaction: Cr2O3 is the formed precipitate.
This is a gas evolution reaction, O2 is the formed gas.
- (NH4)2Cr2O7 – Ammonium dichromate
- Names: Ammonia , Azane (only intended for use in naming derivatives of ammonia) , Hydrogen nitride
- Appearance: Colourless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a pungent, suffocating odor. [Note: Shipped as a liquefied compressed gas. Easily liquefied under pressure.]
- H2O – Water, oxidane