tests for gases

• hydrogen:

  • burning splint held at open end of test tube (of gas)
  • burns rapidly
  • produces a pop sound
• oxygen:

  • glowing splint inserted into a test tube ( of gas)
  • relights in oxygen
• carbon dioxide:

  • aqueous solution of calcium hydroxide, lime water
  • when shaken / bubbled with pipette
  • turns milky / cloudy
• chlorine:

  • damp litmus paper into chlorine gas
  • bleaches the paper which turns white