Atomic Structure and Periodicity- Spectroscopy in Large Lecture Halls II

Spectroscopy in Large Lecture Halls II

Description: Half-filled containers of colored solutions are placed in front of a white light. The light is viewed through a diffraction grating. The absorption spectra of  the colored light can be seen and compared to the spectra of white light.

Source: Journal of Chemical Education

Year: 1988 Vol: 65 Page: 1006

Keywords: White light, Diffraction grating, Diffraction, Spectrum, Absorption

Rating:

Hazard: Low

• Electrical shock hazard
• Breakage hazard
• Aquatic toxicity hazard
• Acute toxicity hazard

Effectiveness: Good

• Results are observable with guidance
• Good connection from demo to course material
• Good reliability
• Moderate failure rate
• Time to results is low
• Mild effects are seen by audience

Difficulty: Medium

• Accurate alignment required
• Demos in which objects are passed out to students
• Simple procedures
• Careful handling of lamps required
• Liquid level must be half-full in cuvette

Safety Precautions:

• Use of UL-approved three-prong and outlet
• Gloves required when handling lamps
• Absorbent material on hand
• Sodium bicarbonate on hand
• Prevent release of reagents to the environment
• Avoid exposures to droplets and vapors

Class: Atomic Structure, Spectroscopy,  Atomic Emission

Division: Analytical Chemistry, General Chemistry

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