Extinguishing Candles with Carbon Dioxide
Preparation and Properties of Carbon Dioxide
Colorful Stalagmites: The Silicate Garden
Equilibrium Between Nitrogen Dioxide and Dinitrogen Tetroxide
Explosive Decomposition of Nitrogen Triiodide
Catalytic Oxidation of Ammonia
Leeching Lead Into Acidic Solution
An Orange Clock Reaction
Description: Two beakers of a clear and colorless liquid are combined. After several seconds, the mixture turns orange.
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Clock reaction, Induction period, Iodate, Precipitate, Complexation
Rating: 
Hazards: Medium
- Oxidizing solids
- Skin irritation
- Skin corrosion
- Eye irritation
- Serious eye damage
- Specific target toxicity – respiratory system
- Acute toxicity – oral
- Short term (acute) aquatic toxicity
- Long term (chronic) aquatic toxicity
- Germ cell mutagenicity
- Reproductive toxicity
- Long term (chronic) organ toxicity – CNS
Effectiveness: Average
- Results are observable without guidance
- Good connection from demo to course materials
- Mild effects are observed by audience
- Contrasts between behavior of systems is noticeable
- Time to results is low
Difficulty: Medium
- Adding reagents in concert or sequentially
- Use of toxic substances
- Procedures with some intermediate steps to result
Safety Precautions:
- Eye protection required
- Gloves required
- Lab coat recommended
- Prepare in a well-ventilated area
- Avoid contact with dusts, mists, or vapors
- Absorbent materials on hand
- Avoid release of reagents to the environment
Class: Kinetics, Solubility
Division: Inorganic Chemistry, General Chemistry
Return to Inorganic Chemistry Demonstrations