Testing for oxygen, hydrogen, carbon dioxide and water

Testing for oxygen, hydrogen, carbon dioxide and water

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Testing for oxygen, hydrogen, carbon dioxide and
water
To test if oxygen is present in a gas or in the air take a test
tube of the gas you will be testing on then light a splint a
blow it out until its just smouldering, then put it in the test
tube. If it relights or glows oxygen is present in the air. This
does not tell you how much oxygen is present however.
To test for hydrogen take a test tube of the gas you will be
testing and place a glowing splint in or just above the
opening of the test tube, if hydrogen is present you will hear
a pop.
To test is carbon dioxide is present you can do two different
things. The first is to take a lit splint and place it in to the
test tube of gas you will be testing, if the concentration of
carbon dioxide is higher than that of oxygen the splint will go
out. Another way of testing for carbon dioxide is to bubble
the gas you are testing through lime water, if the lime water
turns cloudy and white then carbon dioxide is present.
To test for water you put a piece of blue litmus paper in a
test tube with the gas you are testing. If it turns pink then
water is present.

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