Screaming jelly babies

File:Screaming gummy bear (chlorate) abridged.ogg Screaming jelly babies is a popular chemistry demonstration that showcases the exothermic reaction of potassium chlorate with a jelly baby. This experiment is often used in educational settings to illustrate principles of chemical reactions, oxidation, and energy release.

Procedure

The demonstration involves placing a jelly baby into a test tube or other suitable container containing molten potassium chlorate. The potassium chlorate acts as a strong oxidizing agent. When the jelly baby is introduced, it rapidly oxidizes the sugars within the jelly baby, resulting in a vigorous reaction that produces a significant amount of heat, light, and sound. The reaction is often described as the jelly baby "screaming" due to the noise produced.

Chemical Reaction

The primary reaction occurring in the demonstration can be represented by the following chemical equation:

\[ \text{KClO}_3 + \text{C}_6\text{H}_{12}\text{O}_6 \rightarrow \text{KCl} + \text{CO}_2 + \text{H}_2\text{O} + \text{Energy} \]

In this reaction:

• Potassium chlorate (KClO₃) decomposes to release oxygen.
• The oxygen reacts with the glucose (C₆H₁₂O₆) in the jelly baby.
• The products of the reaction include potassium chloride (KCl), carbon dioxide (CO₂), water (H₂O), and a significant amount of energy in the form of heat and light.

Safety Considerations

Due to the vigorous nature of the reaction, several safety precautions must be observed:

• The demonstration should be conducted in a well-ventilated area or under a fume hood to avoid inhalation of fumes.
• Appropriate personal protective equipment (PPE) such as safety goggles, gloves, and lab coats should be worn.
• The reaction should be performed using proper laboratory equipment to contain the reaction and prevent accidents.

Educational Value

The screaming jelly babies demonstration is valuable in educational settings for several reasons:

• It visually and audibly illustrates the concept of an exothermic reaction.
• It demonstrates the rapid oxidation of organic compounds.
• It provides a memorable and engaging way to teach students about chemical reactions and energy release.

Related Topics

• Exothermic reaction
• Oxidation
• Chemical safety
• Demonstration (teaching)
• Potassium chlorate

See Also

• Thermite reaction
• Elephant's toothpaste
• Barking dog reaction