There are a few ways you can remove the oxygen from a test tube. You can flick the side of it until the bubble surface for example.
The truth about the total amount of O2 and CO2 is that they have have the diffrent level of chaning over time.
The chemical test for oxygen is the glowing splint test. In this test, a glowing splint is extinguished in the presence of oxygen due to its ability to support combustion. If the splint reignites, it indicates the absence of oxygen.
Lots of ways. Density and spectroscopy come to mind, but if you're just looking for a quick test of a small quantity and you don't mind using it up in the process: A smoldering (not flaming) wooden splint inserted in a test tube of oxygen will flare into life. A flaming splint inserted in a test tube of hydrogen will cause a small "pop" (and probably blow the splint out) as the hydrogen combusts.
When ammonia gas is produced at the bottom of the test tube and comes in contact with the litmus paper at the mouth of the test tube, it reacts with the water on the litmus paper to form ammonium hydroxide. This reaction changes the color of the litmus paper from red to blue, indicating the presence of ammonia gas. The ammonia gas diffuses up the test tube to reach the litmus paper due to differences in concentration.
I'm not entirely sure but I'm pretty positive it turns black, thus releasing oxygen and this can be proved if the test tube containing the potassium manganate VII is connected to another test tube or bowl containig limewater because it will start to bubble and turn cloudy or milky.
To check the presence of oxygen gas in a test tube, you can perform the glowing splint test. Simply insert a glowing splint into the test tube - if the splint reignites, it indicates the presence of oxygen gas.
Light a splint on fire, and then blow the flame out. You want your splint to be glowing red. Then, simply put the splint into the mouth of the the test tube, and if your splint re-lights up into a flame, you'll know it's oxygen gas.
If a test tube is filled with oxygen when you put a glowing splint into it, the splint will relight. (To make the splint glow you have to light it then blow it out and put it into the test tube immediately.) Hope this helps. XD XD
Oxygen gas can reignite a blown out match in a test tube as it supports combustion by reacting with the match head.
If a burning splint pops in a test tube, it indicates the presence of oxygen. The popping sound is a result of the increased rate of combustion due to the higher oxygen concentration in the test tube.
is carbon dioxide and or hydrogen in a clean empty test tube
If you put a lit match in a test tube of oxygen it will burn with more energy.
The glowing splint will relight if you place it in a flask with oxygen. Scientists do this as a test for oxygen so if it relights, then that means the flask contains oxygen.
If only oxygen is in the test tube, it may burst into flame.
A glowing splint will burst into flame/smoke in pure oxygen (using a test tube).
Oxygen
Take a test tube and put inside it a glowing splint. If the splint relights, the oxygen is present. If not, there is no oxygen.