Since Halloween is around the corner, here’s a popular demo that is certainly engage your students.
Place a beaker of green solution inside a plastic pumpkin, add a mysterious yellow liquid and stand back! Foamy ooze and steam will erupt out of the pumpkin’s eyes and nose.
Please note that this demo requires a 30% hydrogen peroxide solution, which is severely corrosive. Be sure to follow the safety precautions contained in the activity instructions.