======Genie in a Bottle======


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**Alternative titles:** Hydrogen Peroxide Genie
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====Summary====                   
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====Procedure====  
  - Put on safety goggles and protective equipment.  
  - Pour 50–100 mL of 30% hydrogen peroxide into a 2-liter bottle (enough to cover the dimples at the base).  
  - Using a spatula, add a pea-sized amount of manganese dioxide catalyst into the bottle.  
  - Step back and observe as oxygen gas is rapidly released, carrying a plume of mist out of the bottle that looks like a genie.  
  - Note that the reaction is exothermic; the bottle will heat up.



====Links==== 
Genie in a Bottle - Cool Science Experiment - Sick Science!: 
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#SparkofScience - Genie in a Bottle - The Franklin Institute: 
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📄 Genie in a Bottle - Steve Spangler: [[https://stevespangler.com/experiments/genie-in-a-bottle/]]\\


====Variations====
  * Use different container shapes (flask, beaker, or clear bottle) to compare the visual effect of the “genie.”
  * Place the bottle against a dark backdrop for a more dramatic plume effect.



====Safety Precautions====
  * Wear safety goggles, gloves, and a lab coat at all times.  
  * Handle 30% hydrogen peroxide with extreme care; it is a strong oxidizer and can burn skin or eyes.  
  * Avoid contact with combustible materials.  
  * Store hydrogen peroxide in its original container away from light and heat.  
  * Do not perform this demonstration without supervision in a well-ventilated area.  
  * The reaction is exothermic; do not touch the bottle immediately after the experiment.




====Questions to Consider====
  * Why does manganese dioxide speed up the reaction? (It acts as a catalyst, providing a surface for the decomposition of hydrogen peroxide.)  
  * Why is hydrogen peroxide stored in dark bottles? (Light can decompose hydrogen peroxide into water and oxygen.)  
  * What makes the “genie” visible if oxygen is colorless? (The effect comes from tiny water droplets carried out of the bottle with the escaping oxygen gas.)  
  * What everyday uses does hydrogen peroxide have at lower concentrations? (It is commonly used as a disinfectant, cleaner, and bleaching agent.)