Detecting Gases Flashcards
1
Q
How do you detect Carbon Dioxide?
A
You test for carbon dioxide using limewater. The limewater turns cloudy white if carbon dioxide is bubbled through it. Calcium hydroxide + Carbon dioxide -> Water + Calcium Carbonate
2
Q
How do you detect chlorine?
A
Use a drop of tap water to dampen blue litmus paper. Hold the paper close to the container and if chlorine is present, the litmus paper will turn red and then colourless.
3
Q
How do you detect hydrogen?
A
Hold a lighted splint near the mouth of the container, it should ignite with a squeaky pop sound if hydrogen is present.
4
Q
How do you test for oxygen?
A
Hold a glowing splint near the mouth of a container, if oxygen is present the splint will relight.
