a. Mix 4 parts potassium chlorate with 1 part manganese dioxide in a clean test tube.
b. Attach the delivery tube like in the picture.
c. Seal the test tube tightly with a cork.
d. Place the test tube on a stand, tilted slightly down at the opening.
e. Connect the other end of the tube to the beehive shelf underwater.
f. Fill a gas jar with water and turn it upside down on the beehive shelf.
g. Heat the mixture with a Bunsen burner or spirit lamp.
Safety Tips
1. Tilt the test tube as shown to stop water from mixing back with the chemicals.
2. Make sure all connections are airtight.
3. Fill the gas jar fully with water, no air inside.
What Happens:
Heating the mixture makes oxygen gas. The gas collects in the jar by pushing out water. We do this because oxygen mixes a little with water and is lighter than water.
๐ Simple Steps
a. Add manganese dioxide to the flask.
b. Fill the dropping funnel with hydrogen peroxide.
c. Attach the delivery tube like in the picture.
d. Put the upside-down gas jar on the beehive shelf in the water trough.
e. Open the funnel's tap to add hydrogen peroxide drop by drop.
f. Collect oxygen gas in the jar by pushing out water.
g. No heat needed; the reaction makes its own heat.
Safety Tips
1. Make all connections airtight.
2. Ensure the funnel stem dips into the liquid in the flask.
3. Use pure manganese dioxide.
What Happens:
Hydrogen peroxide breaks down with manganese dioxide to make oxygen gas. The gas collects in the jar by pushing out water. We do this because oxygen mixes a little with water and is lighter than water.