Testing for gases

• How do you test for ammonia

  Damp red litmus paper above the test tube
• What is the positive result for ammonia

  Damp red litmus paper turns blue
• How do you test for carbon dioxide?

  Bubble through limewater
• What is the positive result for carbon dioxide?

  Limewater turns milky/cloudy
• What is the test for chlorine?

  Hold damp blue litmus paper of test tube
• What is the positive result for chlorine

  Damp blue litmus paper turns red, then bleaches
• How do you test for hydrogen?

  Hold a lighted splint at the mouth of the test tube
• What is the positive result for hydrogen?

  Burns with a squeaky pop
• What is the test for oxygen?

  Hold a glowing splint into the test tube
• What is the positive result for oxygen


  Splint relights