Testing for Gases (Chemistry) 1

Question 1

Give the method used to test for Oxygen

Answer 1

1. Light a splint.
2. Blow splint out, so its glowing.
3. Lower splint into test tube with suspected oxygen gas.
4. If splint relights, oxygen is present.

Question 2

Give the method used to test for Hydrogen

Answer 2

1. Light a splint.
2. Place inside a test tube with suspected hydrogen gas.
3. If splint gives a squeaky pop, Hydrogen is present.

Question 3

Give the method used to test for Chlorine

Answer 3

1. Take a piece of blue litmus paper and add a few drops of distilled water so its slightly damp.
2. Lower the litmus paper into the test tube with the suspected chlorine gas.
3. If paper turns white, chlorine is present.

Question 4

Give the method used to test for Carbon Dioxide

Answer 4

1. Add some limewater to a test tube.
2. Bubble the unknown gas through the limewater.
3. If carbon dioxide is present, limewater will go colorless to milky.