Thermochemistry- Decomposition of Ammonium Dichromate

Decomposition of Ammonium Dichromate

Description: Ignition of a pile of ammonium dichromate produces a voluminous green solid, sparks, and smoke, resembling a volcanic eruption.

This demonstration is also available on video and JCE Chemistry Comes Alive!” Vol. 1 CD-Rom.

Source: Shakhashiri, B.Z. Chemical Demonstrations: Handbook for Teachers of Chemistry

Year: 1983 Vol. 1 Page 81

Keywords: Combustion, Thermochemistry, Oxidation, Reduction, Decomposition

Rating:

Hazard: High

  • Burn hazard
  • Oxidizing solids
  • Acute toxicity hazard – oral, dermal, inhalation
  • Serious eye damage
  • Skin corrosion hazard
  • Carcinogenicity hazard
  • Reproductive toxicity hazard
  • Germ cell mutagenicity hazard
  • Respiratory sensitization hazard
  • Skin sensitization hazard
  • Flammability hazard

Effectiveness: Average

  • Observable without guidance
  • Some connection from demo to course material
  • Time to results is low
  • Moderate reliability
  • Mild effects are seen by audience

Difficulty: Medium

  • Careful manipulations required
  • Use of toxic substances
  • Procedures with intermediate steps
  • Prior training required
  • Reaction at non-standard conditions

Safety Precautions:

  • Eye protection required
  • Gloves required
  • Lab coat recommended
  • Perform in a well-ventilated area
  • Avoid inhalation with or contact with reagents
  • ABC fire extinguisher on hand

Class: Combustion, Redox

Division: General