Q:

How do you test for carbon dioxide?

A:

Quick Answer

Test for carbon dioxide by burning a splint, using litmus or indicator papers or running the gas through lime water. Additionally, according to the National Institutes of Health, a blood test can be performed to determine the amount of carbon dioxide in a person's blood.

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Full Answer

A chemistry lab offers several different ways in which a person can test a gas to determine if it is carbon dioxide, or CO2:

  • Light a splint

  • Collect carbon dioxide gas in a tube by downward delivery or using a gas syringe. Light a splint, which is a long, thin strip of wood. Insert the lit splint into the tube with the gas. If carbon dioxide is in the tube, the flame will go out.

  • Use litmus paper
  • Place a piece of moist litmus paper into the tube with the carbon dioxide gas. If the gas is present, the litmus paper will turn from blue to red.

  • Use universal indicator paper
  • Place a piece of moist universal indicator paper into the gas tube. If carbon dioxide gas is present, the universal indicator paper will turn yellow.

  • Run the gas through lime water
  • When carbon dioxide is run through lime water, the water turns cloudy. This is because the water is a solution of calcium hydroxide, and when it reacts with carbon dioxide, a solid precipitate of calcium carbonate forms.

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Related Questions

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    What is the process that removes carbon dioxide from the atmosphere?

    A:

    Photosynthesis is the process that removes carbon dioxide from the Earth's atmosphere. Carbon dioxide is also removed from the atmosphere when it mixes with water and forms carbonic acid, which is the acid that's partially responsible for the weatherization of rocks along and in the sea.

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    What percentage of carbon dioxide do we exhale?

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    Why do people breathe out carbon dioxide?

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    Who discovered carbon dioxide?

    A:

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