testing for gases

• hydrogen

  • test - hold a lit splint at the end of a test tube producing gas
  • result - hydrogen burns with a pop noise
• oxygen

  • test - hold a glowing splint in a test tube of the gas
  • result - the splint relights if oxygen is present
• carbon dioxide

  • test - bubble gas through a solution of lime water
  • result - carbon dioxide turns the limewater cloudy
• chlorine

  • test - place damp litmus paper in the gas
  • result - the litmus paper is bleached white