Gas experiments for kids: THE GREAT BLUBBER
There are hundreds of different gases. Most can you not smell it. Therefore they are not even noticed, even if they are nearby. In the following experiment we were able to produce children with a gas that is in the air around us: carbon dioxide.
What materials do you need to conduct the experiment:
- hand drill
- 2 flexible drinking straws
- scissors, a drinking glass
- food coloring
- baking soda
- vinegar bottle
- a small piece of paper or a funnel
- Must first be drilled with a hand drill a hole lengthwise through the cork, lead to a drinking straw through the hole.
- The other end of the straw we slit a bit and put it in the second straw. Both straws must be fit together.
- We fill the jar with water and stir into it a few drops of food color. The water should be well colored, but not too dark.
- Now we give half a tablespoon of baking soda into the bottle. We use a folded piece of paper or a funnel. Then we fill the bottle about half full with vinegar.
- Now the bottle is quickly sealed with the cork and dipped the other end of the second straw in the glass with colored water.
Vinegar and baking soda to foam properly in the bottle. The resulting gas can escape only through the straw in the cork, so it is passed out of the bottle through the straw. The carbon dioxide bubbles in the glass.
Baking powder contains carbonate. Carbonate with an acid, is here mixed with the vinegar, carbon dioxide is formed. The gas forms, and finds its way through the straws in the water in the drinking glass. It comes bubbling and bubbling to the surface.
Gas experiments for kids: What a gas?
This is with the gases for children not so easy, especially against the background that most gases are invisible and impalpable. I’m trying hereby at a fairly child-friendly explanation:
Usually, substances may be present in three different states (so-called physical states): solid, liquid and gaseous.
The simplest is the water. Solid water ice as it is, for example, as ice cubes. From the tap water is liquid and when water boils, it evaporates, goes into the air and is a gas.
In particular, by changing its status from warming substances determined through liquid and gaseous. By lowering the temperature, the states take the opposite approach. At normal room temperature water is liquid, gaseous oxygen, however, and even a rock solid (molten lava is an example of bricks!). The state forms are so often at the same temperature differently. For example, oxygen can also be liquid when it is cooled just enough. Where oxygen can be made for us has been unimaginable cold.
If you consider that substances are composed of many tiny particles, then the gaseous state is characterized by the fact that each individual particle is very mobile and therefore needs lots of space – more space than the solid or liquid state. These particles are moving very love it, the space that is available to them, to fully exploit.
Now it gets complicated: substances in the gaseous state are not always equate with a gas. Water in its gaseous state, water vapor, but no water gas. The best-known for the children gases are carbon dioxide and oxygen. Both are referred to as gas.
If you want to fill gas / gaseous substances in a container that has actually a problem, because only few particles can penetrate. Therefore, compressed gases are happy with a lot of strength in stable bottles. There are examples as the air tanks, the diver or the smaller bottles of carbon dioxide (see Figure), with which we make our own sparkling water.Because gas particles do not feel squeezed, pressing with all his might against the walls of this bottle. So they do not burst the bottles must be thick and firm.