Genie in a Bottle DESCRIPTION: This demo makes use of the catalytic decomposition of hydrogen peroxide to produce a column of steam out of a flask, that looks like a genie coming out of a bottle. TOPICS COVERED: - decomposition reactions - catalysis - exothermic reactions - evolution of a gas - color change - chemical change MATERIALS NEEDED: - 1000mL volumetric flask w/ stopper - aluminum foil - kimwipe - a piece of string - KI - 30% H2O2 - scissors PROCEDURE: 1. Put 2g of KI on a kimwipe, wrap the kimwipe into a sachet, and tie shut, any extra wipe can be cut off the top 2. Put 40mL of H2O2 into the flask 3. Suspend the sachet into the flask with the string, do not let the sachet touch the H2O2 4. Stopper the flask so that the stopper holds the string dangling the sachet in place 5. Wrap the flask in foil so that the flask is ready students can’t see what is inside, now for students to see it 6. Pull the stopper so the sachet falls into the H2O2, releasing the “genie” ADDITIONAL COMMENTS: Baquacil (27% H2O2) can be bought commercially at pool supply stores. SAFETY: Concentrated hydrogen peroxide can cause severe burns, so gloves should be worn and caution taken. Goggles should be worn at all times. The stopper on the flask should have at least one hole in it just in case the reaction were to go off there would be a
Genie in a Bottle DESCRIPTION: This demo makes use of the catalytic decomposition of hydrogen peroxide to produce a column of steam out of a flask, that looks like a genie coming out of a bottle. TOPICS COVERED: - decomposition reactions - catalysis - exothermic reactions - evolution of a gas - color change - chemical change MATERIALS NEEDED: - 1000mL volumetric flask w/ stopper - aluminum foil - kimwipe - a piece of string - KI - 30% H2O2 - scissors PROCEDURE: 1. Put 2g of KI on a kimwipe, wrap the kimwipe into a sachet, and tie shut, any extra wipe can be cut off the top 2. Put 40mL of H2O2 into the flask 3. Suspend the sachet into the flask with the string, do not let the sachet touch the H2O2 4. Stopper the flask so that the stopper holds the string dangling the sachet in place 5. Wrap the flask in foil so that students can’t see what is inside, now the flask is ready for students to see it 6. Pull the stopper so the sachet falls into the H2O2, releasing the “genie” ADDITIONAL COMMENTS: Baquacil (27% H2O2) can be bought commercially at pool supply stores. SAFETY: Concentrated hydrogen peroxide can cause severe burns, so gloves should be worn and caution taken. Goggles should be worn at all times. The stopper on the flask should have at least one hole in it just in case the reaction were to go off there would be a
genie-in-a-bottle3.docx