task 2 - essentials Flashcards
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1
Q
what’s the test for carbon dioxide (CO2)?
A
the limewater test: direct the gas through a tube into limewater. if the limewater goes milky, the gas is carbon dioxide.
2
Q
what’s the test for hydrogen?
A
the pop test: light a match and then expose it to the gas you are trying to determine. if there’s a sudden “pop” noise, the gas is hydrogen. the match should also go out.
3
Q
what’s the test for oxygen?
A
the lighted match test: light a splint and blow it out until only an ember remains. place this splint into the mouth of the tube that contains your unknown gas. if the match relits, the gas is oxygen.
4
Q
what will happen if I blow, through a straw, into a test tube of limewater?
A
