Reaction of Potassium Chlorate and Sucrose
Materials
Demonstration Cart with Plastic Shielding
Fireproof Fiberglass Pad
Large Watchglass
Safety Shield
Small Bottle of Potassium Chlorate and Sucrose Mixture
Sulfuric Acid 18M
1 mL Plastic Dropper
Glasses and Goggles
Advanced Preparation
Mix 12g Potassium Chlorate (KCl03) and 4g Sucrose together with a large mortar and pestle. Make sure the powder is well combined and all lumps are ground out. Place this mixture in a small bottle.
Procedure
- Place a watchglass on a fireproof fiberglass pad. Do this demonstration on the cart with the safety shielding, and then place the small safety shield in front.
- Pour the mixture of Potassium Chlorate and sucrose onto the watch glass
- Add 1 drop of concentrated sulfuric acid to the mix and step back.
- Reaction start slowly, then bursts into flame with lots of smoke.
- Wait for applause.
Reactions
The stoichiometry of the reaction is not known. It has been reported that chloric acid (ClO3) is formed when KClO3 and H2SO4 are mixed and that chloric acid decomposes organic substances very rapidly, often with inflammation.
Waste Management
The contaminated watch glass should be bagged and given to EH&S as hazardous waste (Toxic Solid Oxidizer).