8.2 Identification of common gases Flashcards
(6 cards)
1
Q
What are the types of gas tests? (4)
A
- Hydrogen test
- Oxygen test
- Carbon dioxide test
- Chlorine test
2
Q
How do you test for hydrogen, include the results? (2)
A
Hold a burning splint at the open end of a test tube of gas.
- Hydrogen burns rapidly with a pop sound.
3
Q
How do you test for oxygen, including the results? (2)
A
Insert a glowing splint into a tests tube tube of the gas.
- The splint relights in oxygen
4
Q
How do you test for carbon dioxide, including the results? (2)
A
Bubble, or shake, carbon dioxide through limewater.
- Carbon dioxide turns limewater cloudy/milky.
5
Q
How do you test for chlorine, including the results? (2)
A
Put damp blue litmus paper into chlorine gas.
- Chlorine bleaches the litmus paper - turns white.
6
Q
What is limewater?
A
An aqueous solution of calcium hydroxide.
