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| Oil and glass blue color science experiment |
One possible science experiment that involves oil and glass
and produces a blue color is the creation of a homemade lava lamp.
Materials:
A clear glass or plastic bottle with a narrow neck
Water
Vegetable oil
Food coloring (blue)
Alka-Seltzer tablets
Procedure:
1- Fill the bottle about 1/4 full with water.
2- Add several drops of blue food coloring to the water and
stir.
3- Fill the rest of the bottle with vegetable oil, leaving a
small gap at the top.
4- Wait for the oil and water to separate into distinct
layers. This may take a few minutes.
5- Break an Alka-Seltzer tablet into small pieces and drop
them into the bottle one at a time.
6- Observe what happens as the Alka-Seltzer reacts with the water and creates bubbles that rise up through the oil. As the bubbles burst at the surface, the colored water droplets will fall back down and create a lava lamp-like effect.
Explanation:
The blue food coloring added to the water gives it a blue color, which is visible when the colored water droplets rise and fall. The vegetable oil does not mix with the water, so it forms a separate layer on top. When the Alka-Seltzer reacts with the water, it creates carbon dioxide gas bubbles, which rise up through the oil and carry some of the colored water with them. When the bubbles reach the surface, they burst and release the gas, causing the droplets of colored water to fall back down through the oil. This cycle repeats as more Alka-Seltzer is added.
