* Oxygen is only slightly soluble in water. This means that when oxygen gas is bubbled into water, it doesn't dissolve very much.
* Oxygen is less dense than water. This means that oxygen gas will rise to the top of a container of water.
How it works:
1. Generate oxygen: You can generate oxygen through various methods like the decomposition of hydrogen peroxide or the electrolysis of water.
2. Fill a container with water: Use a container with a narrow opening at the top, like a graduated cylinder or a bottle.
3. Inversion: Fill the container completely with water and then carefully invert it into a basin of water, making sure the opening stays submerged.
4. Bubble oxygen: Pass the oxygen gas generated through a delivery tube into the inverted container. The oxygen bubbles will rise and displace the water.
5. Collect the oxygen: As the water is displaced, oxygen gas will fill the container. You can then remove the delivery tube and stopper the container to keep the collected oxygen.
Important note: Make sure the delivery tube reaches the bottom of the container to ensure the oxygen bubbles through the water and not just into the air space above the water.
