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InterviewSolution
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characteristic test of nitrogen |
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Answer» Moisten a piece of red litmus paper with filtered water. You can purchase red litmus paper at various science supply stores, and it’s also often available at pet or pool supply stores. Place your piece of moistened red litmus paper in a test tube. Fill the test tube with the gas you want to test and stopper it. Wait a few minutes. If the red litmus paper turns blue, it means that the test tube contains a basic gas. If the color of the paper doesn’t change, then there is no basic gas in the tube. You can then repeat the test with blue litmus paper. If it turns red, this indicates there is an acidic gas in the test tube. If both types of litmus paper fail to change color, this indicates that there is a pure elemental gas such as nitrogen in the tube. |
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