2. 1. The first step is to put on your safety
glasses.
2. Measure 20 mL of the 30% hydrogen
peroxide into the graduated cylinder.
Mix two solutions It's best to place the cylinder in a
together and you get large tray to make the clean-up as
easy as possible.
an amazing eruption 3. Add a squirt (that's a technical term
of oxygen-filled foam meaning about 5 mL) of dish soap to PHOTOS OF US DOING
the graduated cylinder containing
that looks like a giant the 30% hydrogen peroxide. THE PROJECT
stream of 4. Add a few drops of food coloring to
spice things up.
toothpaste... or 5. The last step is to add 5 mL of the
elephant toothpaste 2M sodium iodide solution (2M
refers to the molarity of the
solution). The reaction takes place
quickly, so it's important to stand
back.
6. You'll notice that the foam has a
brown tint. This is due to the
presence of free iodine produced by
the extreme oxidizing power of the
30% hydrogen peroxide.
