The Visible Mole
Description: A mole of carbon dioxide is generated from one mole of sodium bicarbonate and excess HCL. The gas is trapped in a 25-liter graduated cylinder. This can be related to stoichiometry, gas laws, and vapor pressure.
Source: Commercially available device & instructions – Flinn Scientific Inc.
Year: 1985 Vol: N/A Page: unknown
Keywords: Stoichiometry, Molar volume, Hydrochloric Acid, Carbon dioxide, Acid base reactions
Rating: 
Hazard: Medium
- Skin corrosion hazard
- Serious eye damage
- Corrosive to metals
- Inhalation hazard
- Acute toxicity hazard
Effectiveness: Average
- Time to results is high
- Moderate failure rate
- Mild effects are seen by audience
- Some connection from demo to course material
- Results are observable without guidance
Difficulty: High
- Large container
- Injection of chemicals
- Multi-step procedure
- Manipulation-dependent results
- Use of toxic reagents
- Pressure tight system in use
- Prior practice is recommended
Safety Precautions:
- Perform in a well-ventilated area
- Use of chemically resistant surface
- Eye protection required
- Gloves required
- Sodium bicarbonate on hand
- Sharps cover on hand
- Avoid exposure to mists, gases, or vapors
Class: Acids and Bases, Gas-Producing Reaction
Division: General
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