Question

Describe briefly a chemical test to identify a sample of each of the following gases in the laboratory. For each test include a short description of the procedure (method) and the expected observations. a) hydrogen gas b) oxygen gas c) carbon dioxide gas ​

Answer 1

1. Gaseous acetylene (C2H2) reacts with oxygen gas to form gaseous carbon dioxide and gaseous water. 2. Chlorine gas reacts with aqueous potassium iodide to form solid iodine and aqueous potassium chloride. 3. Solid lithium oxide reacts with liquid water to form aqueous lithium hydroxide. 4. Gaseous carbon monoxide reacts with oxygen gas to form carbon dioxide gas.