Asked in Elements and Compounds
How is hydrogen detected in the test for carbon and hydrogen?
July 04, 2009 9:25AM
Carbon and hydrogen are detected qualitatively by heating a mixture of the given substance with dry copper (II) oxide in a glass tube. The organic substance is oxidize and carbon dioxide and water are formed. The presence of carbon dioxide is indicated by the formation of a white precipitate of calcium carbonate, when the gaseous products are passed through a solution of lime water. The presence of hydrogen is indicated by the formation of droplets of water in the tube.