The document provides instructions for an experiment involving mixing 30% hydrogen peroxide with sodium iodide solution and food coloring. Safety equipment like gloves, glasses and a tray are required. The procedure has 6 steps: adding 20mL hydrogen peroxide to a cylinder, then soap, food coloring, and 5mL sodium iodide which causes a quick reaction producing brown foamy iodine.

1. • Hydrogen peroxide (30%) - This is ten times stronger than the normal hydrogen
peroxide you can find at the store
• Sodium iodide solution, 2 M
or
• Potassium iodide solution, 2 M
• Liquid soap
• Food coloring
• Graduated cylinder (500 mL)
• Safety glasses
• Rubber gloves for clean-up
1. The first step is to put on your safety glasses.
2. Measure 20 mL of the 30% hydrogen peroxide into the graduated cylinder. It's
best to place the cylinder in a large tray to make the clean-up as easy as possible.
3. Add a squirt (that's a technical term meaning about 5 mL) of dish soap to the
graduated cylinder containing the 30% hydrogen peroxide.
4. Add a few drops of food coloring to spice things up.
5. The last step is to add 5 mL of the 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.