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.Know More
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.
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.
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.
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.
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.Full Answer >
About 4 percent of exhaled air is carbon dioxide, and 16 percent is oxygen. The majority of exhaled air — approximately 79 percent — is nitrogen. Carbon dioxide is released into the environment because is it a waste product.Full Answer >
People and animals breathe in oxygen and breathe out carbon dioxide because of a process called cellular respiration. During cellular respiration, oxygen is combined with food nutrients and water in order to produce usable energy in the form of adenosine tri-phosphate (ATP). The byproduct of this process is carbon dioxide, which is removed from the body through breathing.Full Answer >
Scottish physician and chemist Joseph Black discovered carbon dioxide on June 11, 1754. He noticed that heating calcium carbonate produced a gas much heavier than air. He also noted that it could put out fire. He called the gas "fixed air."Full Answer >