The purpose of this is to find the time taken by the release of bubbles produced by one Alka-Seltzer tablet.
Things Required:
1 Alka-Seltzer tablet
Soda bottle
Clay ball, the size of a walnut
18-inch piece of aquarium tubing jar
Directions:
Pour 1/4 cup of water into the soda bottle. Squeeze the clay around the tubing about 2 inches from one end. Fill the jar with water. Place the free end of the tube in the jar of water. Break the Alka-
Seltzer tablet into small pieces; quickly drop the pieces into the soda bottle. Immediately insert the tube into the bottle; seal the opening with the clay. Record the time. Watch and record the time when the bubbling stops.
This Is What Happens:
The tablet immediately reacts with the water to produce bubbles. The bubbles are released for about 25 minutes.
Science Behind It:
The dry acid and baking soda in the tablet are able to combine with the water to form carbon dioxide gas. It is the carbon dioxide gas that moves through the tube and forms bubbles in the glass of water. The bubbling stops when all of the material reacts.
