Gases- Barometer Made of Dense Aqueous Solution

 Barometer Made of Dense Aqueous Solution

Description: Video of a ten-foot barometer filled with a solution of potassium tetraiodomercurate (II). The density of the solution is reactive to the size of the barometer. This demonstration is also available on JCE “Chemistry Comes Alive!” Vol. 2 CD-Rom Source: JCE software “Chemistry Comes Alive!” Year: 1999  Vol: 76  Page:  1311 Keywords: Barometer, Potassium tetraiodomercurate (II), Density Rating: Hazard: Low

• Not a lecture experiment; video only

Effectiveness: Average

• Mild effects are seen by audience
• Good reliability

Difficulty: Low

• Simple manipulations

Safety Precautions:

• Use UL approved three-prong plug and outlet

Class: Gas Laws, Video, Physical Chemistry Division: General