Buffering Action of Alka-Seltzer®
Description: The amount of acid necessary to change universal indicator’s color in water is dramatically increased when Alka-Seltzer® is dissolved in water.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 186
Keywords: Buffer, Alka-Seltzer®, Universal Indicator
Rating: 
Hazard: Some
- Use of mildly reactive or gas-producing chemicals
- Skin corrosion hazard
- Corrosive to metals
- Mild acute toxicity hazard
- Reproductive toxicity
Effectiveness: Average
- Somewhat connected conceptually to course material
- Mild effects are seen by audience
- Secondary effects are observed by audience
- Time to result is medium
- Systems contrast is noticeable
Difficulty: Low
- Simple procedures
- Manipulations are simple for most to perform
Safety Precautions:
- Eye protection is required
- Gloves are required
- Absorbent materials on hand
- Sodium bicarbonate on hand
- Avoid exposures to mists, vapors, or droplets
Class: Acid and Bases, Gas-Producing Reaction
Division: General