Medicine Cabinet Kinetics
Two photos, each showing three beakers with liquids. In the first photo, a beaker with a white solid at the bottom of the beaker producing some gas, a beaker with a white solid and more gas making the liquid cloudy, and a beaker with white foam in its upper layer of cloudy liquid. In the second photo, a beaker with a white solid at the bottom of the beaker, a beaker with foam in its upper layer of cloudy liquid, and a beaker with bubbles.
Description: Alka Seltzer® reacts faster with hot water than with cold water.
Source: Summerlin, L.R., Ealy J.L. Chemical Demonstrations: A Sourcebook for Teachers: 2nd Edition
Year: 1988 Vol: 1 Page: 100
Keywords: Alka Seltzer®, Temperature, Reaction rate, Gas, Kinetics
Rating: 
Hazard: Low
- No toxic chemicals in use
- Electric shock hazard
- Scalding hazard
Effectiveness: Average
- Results are observable with guidance
- Mild effects are seen by audience
- Somewhat connected to course material
- Time to results is medium
- Contrast in systems behavior is small
Difficulty: Medium
- Reaction or demos at non-standard conditions
- Procedures with some intermediate steps to results
- Simple manipulations for most to perform
- Demos in which a display is used
Safety Precautions:
- Eye protection required
- Gloves required
- Use of UL approved three-prong plug and outlet
- Absorbent materials on hand
Class: Kinetics
Division: General
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