Did everyone watch the "Tiangong Classroom" on December 9?
Don't watch the quick make-up lessons! (Forked waist)
Experiments with "floating" bubbles and water balloons are also too beautiful!
Today we are thinking of a way on Earth
, let the bubbles float up ~
Experimental equipment
Cup, baking soda, vinegar, soapy water, bubble blower, straw, beaker
Experimental process
First, spread the baking soda evenly over the bottom of the beaker,
And then slowly pour in some white vinegar,
See a large number of bubbles bubbling up.
After waiting a little for the reaction rate to decrease,
Use a bubble blower or bubble machine to blow bubbles above the cup,
And catch the bubbles with a cup.
We see bubbles suspended in the cup.
If you use a bubble blower, try to keep your mouth farther away from the bubble blower
And try not to blow into the cup.
This time we use a straw dipped in soapy water to blow bubbles into the cup to try it out
We found that bubbles can also float up,
However, the landing is relatively fast.
Explanation of the principles
Smart little friends don't see baking soda and vinegar to understand!
This time we are using carbon dioxide, which is slightly denser than air. Bubbles are buoyant by carbon dioxide, and they can be "suspended" like in space
And if we blow bubbles with a straw, because the gas we exhale is slightly denser than the air, and when it blows down, it will bring air flow, so the carbon dioxide layer above the water surface that is not very honest is more difficult to hold the bubble.
The next time you play with someone else to blow bubbles, how to make your own drift longer, learn it
Edit: Lychee