It's almost Halloween! Are you carving pumpkins? Or dressing up like ghouls or ghosts? We have some fun science experiments to help put you in the Halloween spirit!
In this month's 20 Minute Lab, we put a twist on a classic chemical reaction to make exploding Halloween bags. This is a great project for a sunny or rainy day. (Bonus: the rain will help clean up your explosions!)
Note: The listed ingredients are enough for a single bag, so keep in mind that you'll need more of everything if you want to do more than one! Also, this is a messy experiment that is best done outdoors.
WHAT'S GOING ON?
Did your baggie bubble up and explode? Why do you think this happened?
A chemical reaction occurred between the vinegar and the baking soda. Baking soda is a base and vinegar is an acid.
When you mixed them together, an acid-base reaction occurred.
In this chemical reaction, a new substance is formed - carbon dioxide (CO2)! CO2 is a gas, and as the reaction happened in your bag, more and more CO2 gas was released (those were the bubbles you saw!) The pressure increased in the bag until it exploded!
The reaction would happen with the corn starch - but we added it here because it helps to thicken the mixture so you can better see the colors. We also added the extra to fill up space in the bag, so we didn't have to use too much vinegar and baking soda.
Have you ever shaken up a can of soda and watched it explode when you open it? That's similar to what's happening in this experiment! The carbon dioxide in the soda creates pressure in the can, that escapes when you open a hole in the top!
To find out more about acids and bases, check out our Acids, Bases, & pH kit!
SHARE WITH US!
For more exciting experiments, check out our Yellow Scope science kits on the Shop tab of our website!