Have you seen the fireworks? It is beautiful, right? Now, have you tried to do water fireworks? This is also fireworks but it is different because you may see in water. So, Pandai Lab 9 brings you to make water firework experiments using simple materials!
On 24 November 2020, this simple activity explores the science of liquid densities in a truly mesmerizing way. This is a fun science experiment that you can do again and again, using just everyday items you probably already have at home. Here the details for experiment:
Date: 24 November 2020
Title: Water Firework Experiment
Materials: food colourings, a jar, water, cooking oil, a glass
1. Begin by filling an empty jar 3/4 of the way with water.
2. Pour a little oil into the other glass (1 to 2 tablespoons).
3. Then, you can have several drops of food coloring into the glass.
4. Use a spoon to stir the food coloring into the oil. It will not mix, but stirring will help to break the food coloring into smaller droplets.
5. Now, pour the container of oil into the jar of water.
6. After a moment or two the oil will settle at the top of the jar, but the food coloring will begin to shoot down and mix into the water, creating a “fireworks” effect!
7.The food colors will continue to shoot down like fireworks until all of the droplets have fallen from the oil.
What makes this possible and happened?
As you probably experienced, oil and food coloring do not mix well. Food coloring dissolves in water, but not in oil. So when you pour in your food coloring/oil mixture the oil will float at the top of the water because it is less dense, and the food coloring will begin to dissolve once they sink through the oil and into the water. Oil is less dense than water, so the oil will float at the top of the glass. As the colored drops sink to the bottom of the oil, they mix with the water. The color diffuses outward as the heavier colored drop falls to the bottom
You can check the reference on this link for more details:
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