17 mars 2014 1 17 /03 /mars /2014 08:43
(: Dry ice bubble :)
(science experiment 3)
- (Transparent) basin with a large rim
- Strip of fabric (cotton)
- Graduated cylinder
- Weighing scale
- Solid carbon dioxide
- Dish soap
Dry ice is extremely cold : -7.5°C !!!
NEVER TOUCH IT WITH BARE HANDS or SKIN !
If you touch the dry ice, you'll cause injury similar to a burn.
First, we are going to prepare the soap mixture.
Pour 50mL of water in a large jam pot.
Add 10g of sugar. Mix the ingredients.
Add 40mL of dish soap. Doesnt stir !
Add 20mL of glycerin. Stir gentli (no too fast because bubles will appared !)
Add 80mL of water. Stir again.
Now, let's make a giant dry ice bubble!
Fill 2/3 of the basin with water.
With your oven mitt, take a piece of dry ice (with the gloves, of course) and put it gently in the water. Do not throw it !
Stretch it and slowly rub it along the edge of the basin in order to create a single bubble.
Wait for the bubble to grow and burst.
You can do it again if you have the time. (you can do the experiment again replacing water by a soft drink with quinina to observe under ultraviolet light)