You have probably seem the classic science volcano where you mix baking soda and vinegar, but that is not the only fun we can have with those ingredients.
When you mix baking soda and vinegar, the chemical reaction produces carbon dioxide, this is what cause the “lava” to overflow in the volcano demo. You can also capture that carbon dioxide gas (CO2) and use it for other purposes.
In this experiment, we used the carbon dioxide to “blow out” some candles. This is a great experiment where you can discuss: density of gasses, fire, and chemical reactions.
Remember that a fire needs 3 things: heat, oxygen, and fuel. When we blow out candles, the flow of air removes the heat, and the fire goes out. CO2 is heavier than the surrounding air, so you can pour it on the candles. By pouring the carbon dioxide on the flame, we deprived the fire of oxygen.
In order to fill the jar with CO2, I mixed baking soda and vinegar in a larger container and then carefully poured the invisible gas into the jar in the video. You can also pour straight from the container where you mix, but it is more dramatic when the jar looks completely empty.
I also used this as an object lesson when I was speaking to our kids AWANA club. It is a good demonstration that even things you cannot see are real. Even though we cannot see God, we know He is there because we see His Creation, and we see the things He has done in our lives.
Visit back next week for another “explosive” experiment with baking soda and vinegar.
Hebrews 11:1 Now faith is the assurance of things hoped for, the conviction of things not seen.