First, the girls each put 1 tablespoon of baking soda on a small piece of paper towel and folded it up.
Then we put a half cup of white vinegar and a fourth cup of warm water in the bag (the water wasn't that warm by the time it finally made it to the bag). We sealed the bag, backed up, and waited.
The bags got really big, but they never actually popped...until E(2) stepped on them! The baking soda was old and the water wasn't very warm, which probably made the reaction less strong than it should have been. That was ok though, we still had fun!
Just to let you know some days ago I posted a link to your blog.
Thanks for your ideas.
Looks like you are all having lots of fun!ReplyDelete
Have you ever come across tartaric or citric acid? It comes in granules like sugar, and it is used in cheese and wine making. It is also the sour sugar-stuff on fizzy haribo sweets. I got some from eBay and tried some neat on my tongue once, and it was the sourest thing I have ever tasted! :D
I was messing around with vinegar and baking soda, and I decide to see how the tartaric acid reacted. It's the same reaction as baking soda, but faster and more dramatic. It might be a fun thing to add to your experiments, for a bit of compare and contrast.
You really should try again with some new supplies. My boys had such a fun time with it and they all exploded for us.ReplyDelete