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
In the first photo, a beaker with a clear and colorless mixture. In the second photo, a beaker with an orange mixture
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