January 13, 2011

Bath Fizzies/Bath Bombs

We made bath fizzies the other day.  I thought that it would be good for a science talk and very small math lesson.

I found two recipes HERE and HERE that I let the boys choose from.  One we split in half, one we doubled.

Here are a few pictures of our day.

They work awesome too...the boys have each had lots of fun having baths with them!  :)

Here is the simple science behind WHY a bath fizzy, fizzes:

What's Happening?

A bath fizzy is showing how acids and bases react when they are mixed together.  The baking soda (sodium bicarbonate) is the base and the citric acid is the acid.

When the bath bomb dissolves in water, there is a chemical reaction between the citric acid and the sodium bicarbonate (baking soda). The result is called sodium citrate. During the reaction, carbon dioxide is released. This causes the 'fizzing' that you see, similar to that in carbonated water.  (here is an experiment on carbonating your own water) Water is needed for the reaction to occur because is dissolves the solids and allows the ions in the acid and the base to move and collide with each other, causing a reaction to occur. 

And, of course, the oils and the fragrances are useful as a liquid to help form the bath bombs as well as cause the skin to be smooth and scented.

As I was searching for some fun things to do to enhance this experiment, I went to one of my very favorite sites, the Naked Scientists.  There were a few really great things I bookmarked to try later, here they are:

Lava Lamps
Lemonade Volcano
Dancing Raisins (we actually did this one in a different unit and thought it was cool)
and the old classic Volcano (you know the one that all kids submit to their first Science Fair...)

Have a BLAST making some exploding and fizzing things!  :)

Jaime is in her second year of homeschooling her 3 boys and often wonders why she missed out on all this fun for this many years!  She loves crafting, photography, reading, cooking, taking care of her family, homeschooling, learning new things, and many others.  You can find a mish mash of all of that on her family blog at Welcome to the Madness

1 comments - Add a comment below -:

Kimberly said...

Ooh fun! Thanks for the link to Naked Scientist.