Chemical Reactions And Physical Changes: How To Test For Different Gases

Question 1

How can we test to see if a gas is hydrogen?

Answer 1

Adding a piece of metal to an acid in a test tube
Lighting a wooden splint
Putting it into the test tube
It makes a ‘pop’ sound because the flame ignites the hydrogen.
This is the squeaky pop test.

Question 2

How can we test to see if a gas is carbon dioxide?

Answer 2

By mixing a sample and an acid to create a chemical reaction.

Letting it bubble and put the gas into limewater.

If the limewater turns milky, carbon dioxide has been formed.