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Gas Tests

Key Stage 3

Meaning

The gas tests are a series of experiments used to identify which gas has been produced in a chemical reaction.

The Gas Tests

Carbon Dioxide

  1. Use a delivery tube to bubble the gas through Limewater.
  2. If the Limewater turns from transparent to cloudy then the gas is Carbon Dioxide.

Hydrogen

  1. Collect the gas in a test tube.
  2. Place a lit splint over the mouth of the test tube.
  3. If a 'squeaky pop' sound is made then the gas is Hydrogen.

Oxygen

  1. Collect the gas in a test tube.
  2. Place a glowing splint over the mouth of the test tube.
  3. If the splint relights then the gas is Oxygen.

Chlorine

  1. Collect the gas in a test tube.
  2. Place a piece of litmus paper over the mouth of the test tube.
  3. If the litmus paper is bleached white then the gas is Chlorine.

Key Stage 4

Meaning

The gas tests are a series of experiments used to identify which gas has been produced in a chemical reaction.

The Gas Tests

Carbon Dioxide

  1. Use a delivery tube to bubble the gas through Limewater.
  2. If the Limewater turns from transparent to cloudy then the gas is Carbon Dioxide.

Hydrogen

  1. Collect the gas in a test tube.
  2. Place a lit splint over the mouth of the test tube.
  3. If a 'squeaky pop' sound is made then the gas is Hydrogen.

Oxygen

  1. Collect the gas in a test tube.
  2. Place a glowing splint over the mouth of the test tube.
  3. If the splint relights then the gas is Oxygen.

Chlorine

  1. Collect the gas in a test tube.
  2. Place a piece of litmus paper over the mouth of the test tube.
  3. If the litmus paper is bleached white then the gas is Chlorine.

References

AQA

Gas tests, pages 262, 272-3, 280, GCSE Chemistry; Student Book, Collins, AQA