GCSE Chemistry - How to Test for Gases - Testing for Chlorine / Oxygen / Hydrogen / CO2 #64

This video tutorial explains how to test for four gases: chlorine, oxygen, hydrogen, and carbon dioxide. The chlorine test involves using damp blue litmus paper, which turns white if chlorine is present. The oxygen test uses a glowing splint that relights in the presence of oxygen. For hydrogen, a burning splint produces a squeaky pop sound. The carbon dioxide test involves bubbling the gas through lime water, which turns cloudy if carbon dioxide is present. Safety precautions, such as wearing a mask when testing chlorine, are also discussed.

What reaction occurs when carbon dioxide is bubbled through lime water?

Summarize the results of the tests for chlorine, oxygen, hydrogen, and carbon dioxide.