Lab Preparation
*It is best to prepare your lab before students begin the lab activity. Please follow the
directions below to assist in preparing your laboratory.
Materials and Equipment
H2O2 (Hydrogen Peroxide 3% solution)
Liquid starch
KI (Potassium Iodide)
Distilled Water
3 beakers (500ml)
Preparation Instructions- The teacher will prepare the three solutions used inside
the lab activity for students.
Step 1- Measure out 100ml of H2O2 (Hydrogen Peroxide 3%) for each group. Place H2O2
in a beaker and label it H2O2.
Step 2. Measure out approximately 4 grams of KI (Potassium Iodide) and dissolve in 250
ml of distilled water. Label this solution Potassium Iodide solution.
Step 3. Measure out approximately 20ml of Starch along with 200ml of distilled water.
Pour the ingredients together inside a beaker and label it Starch solution.
Step 4. Use the lab activity to ensure that students have all their materials and equipment
in place before the lab activity begins.
Step 5. Make sure to have 3 solutions (Hydrogen Peroxide, Starch, and Potassium Iodide
Solution) prepared for each group.
Note: Refer to all Material Safety Data Sheets (MSDS) and use proper personal
protective equipment for all chemicals.
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authored by Tiffany Gillion