Method
Collecting Carbon Dioxide from Soda
Set up the equipment used for the experiment. Use enough clay to stick one end of the clay
into the plastic tubing so 1/2 will be able to come out the other end.
Open the bottle of soda and mold the clay into an airtight stopper by forcing it into the top
of the bottle. The short end of the tube should be above the soda in the bottle. Put the other end
of the tube in the wash basin of water.
Place one of the small jars in the basin, completely filling it with water. Turn the jar upside
down and put it on the bottom of the basin.
Next, drive off the gas in the soda. To do this, stand the soda bottle in the bowl of hot tap
water. The end of the tube in the basin should be blowing bubbles. Let the bubbles rise. Drive
out the air om the bottle and the tube for a few minutes.
To collect the gas, hold the water-filled collecting jar in the basin over the tube. The bubbles
will rise to the surface and drive the water from the jar back into the basin. When you have
filled the jar with the gas from the soda, bubbles will appear outside the jar and rise to the
suface.
While you are still holding the jar filled with gas upside down and underwater, remove the
tube from the jar, leaving the tube in the basin, and put a plastic dist across top of the jar.
Make sure the disk stays in place as you take out the jar from the basin. Turn the jar right side
up. Set it aside after the jar has the lid on it. Collect more jars of gas until there is no more
fizz coming from the soda.
Collecting Carbon Dioxide from Yeast
Put 1 cup of water into a clean, empty soda or water bottle. Add 1 tablespoon of sugar and
1 tablespoon of dried yeast. PUt the cap on the bottle and shake it so it is mixed well. Take off
the bottle cap and push the clay plug stopper with the tube in the tap like the experiment before.
Put the bottlein a bowl of hot tap water. Place the tube in the basin. Watch the bubbles
coming off. Let it bubble for about ten minutes before collecting the gas from the yeast. When
collecting yeast only collect a jar or two of gas.
Collecting Carbon Dioxide from a Chemical Reaction
Put 1 tablespoon of baking soda in a clean, empty bottle.
Add 1/2 cup of vinegar. install the plug with the tube. This reaction will happen swiftly. When
this reaction stops, add more baking soda. Collect only a jar or two of gas.