Q:

How do you test for carbon dioxide?

A:

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.

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.

Learn More

Related Questions

  • Q:

    What is the compound H3PO4?

    A:

    The compound H3PO4 is phosphoric acid. As a solid, it is a crystal that is odorless and colorless; as an aqueous solution, it is an odorless, clear liquid.

    Full Answer >
    Filed Under:
  • Q:

    What is a chemical property of sulfur?

    A:

    A chemical property of sulfur is that it does not react with water, and it burns in the air to produce sulfur dioxide. It also reacts with halogens and hot potassium hydroxide, which is a base. Chemical properties of elements include pH level, reactivity with water and heat combustion, while physical properties of elements are their boiling and melting points, appearance, color and density.

    Full Answer >
    Filed Under:
  • Q:

    What is zinc nitrite?

    A:

    Zinc nitrite is a salt of zinc obtained by adding sodium nitrite to zinc sulphate, using alcohol as a liquid medium. The molecular formula of zinc nitrite is Zn(NO2)2, and its molecular weight is 157.42 grams.

    Full Answer >
    Filed Under:
  • Q:

    What is the cost of the element mercury?

    A:

    As of 2014, the element mercury costs between $2,950 and $3,075 per flask. A flask is equivalent to 76 pounds.

    Full Answer >
    Filed Under:

Explore