All experiments should be performed with adult supervision.
Appropriate safety wear, such as googles and gloves, should be worn.
- Begin by removing the cap of your plastic bottle and slowly filling it 2/3 of the way up with oil. Make sure to pour slowly.
- Next, fill the remaining third of your bottle with water. Pour slowly to reduce bubbles. Watch as the water sinks past the oil to the bottom.
- Now, add four drops of food coloring and watch it dissolve. If it doesn’t dissolve quickly, tap the bottle to speed things up. It’s working when the food coloring changes the color of the water.
- Now, break one antacid tablet in half and drop half into your bottle. Don’t seal the bottle with its cap just yet. You should see colored bubbles moving up to your bottle’s surface.
- Let’s add the other half of the antacid tablet - bigger drops of colored water should begin to form.
- Now, close your bottle and turn it upside down to see it truly transform: the antacid is forming CO2 bubbles that are attaching to the blobs of colored water and making them float to the surface.
- Congratulations! You’ve created an intermolecular force between CO2 and water - the same force scientists study to create water purification membranes. Enjoy your Lava Lamp!