Atomic Structure and Periodicity- Flame Test for Metallic Ions

Flame Test for Metallic Ions

Description: Alcoholic/aqueous solutions of several metal salts are burned in flame-proof dishes. After a few moments, the flames give characteristic flame-test colors. The flames last a long time, in contrast to ordinary flame-tests.

This demonstration is also available on video and JCE  “Chemistry Comes Alive”  Vol. 2  CD-Rom

Source: UW Card Catalog

Year: 2000  Vol: 77   Page: 671

Keywords: Emission, Ionization, Metal salts, Flame, Spectra colors

Rating:

Hazard: Medium

• Flammability hazard
• Inhalation hazard
• Acute toxicity hazard – inhalation, dermal
• Explosion hazard
• Aquatic toxicity hazard

Effectiveness: Average

• Results are observable without guidance
• Demo somewhat connected to course material
• Time to results is low
• Behavior contrast of systems under study is noticeable
• Mild effects are seen  by audience

Difficulty: Low

• Simple procedures
• Simple manipulations for most to perform
• Use of open flames

Safety Precautions:

• ABC fire extinguisher on hand
• Use fire resistant surface
• Perform in a well-ventilated area
• Eye protection required
• Gloves required
• Lab coat recommended
• Absorbent material on hand
• Avoid exposure to mists, dust, or vapor
• Note invisible, flammable vapor present

Class: Atomic Structure, Combustion, Atomic Emission

Division: General, Analytical Chemistry

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