The Open Door Web Site : Chemistry : The Properties of Gases : The Preparation of Gases in the Laboratory

Name of gas	Image hyperlink	Formula	Prepared in the laboratory by:
methane		CH₄	_{Heating a compound called sodium ethanoate with another compound soda-lime (sodium hydroxide). The methane gas is collected over water.}

oxygen		O₂	_{Adding hydrogen peroxide solution to manganese IV oxide powder. The oxygen gas is collected over water.}

carbon dioxide		CO₂	_{Adding dilute hydrochloric acid to calcium carbonate powder or chips. The carbon dioxide gas is collected by downward delivery.}

chlorine		Cl₂	_{Heating concentrated hydrochloric acid with manganese IV oxide. The chlorine gas is collected by downward delivery.}

hydrogen		H₂	_{Adding dilute acid to zinc granules. The hydrogen gas is collected over water.}

hydrogen sulphide		H₂S	_{Adding dilute acid to iron II sulphide. The hydrogen sulphide gas is collected over water.}

hydrogen chloride		HCl	_{Adding concentrated sulphuric acid to sodium chloride. The hydrogen chloride gas is collected by downward delivery}

ammonia		NH₃	_{Heating together ammonium chloride and calcium hydroxide. The ammonia gas is dried by passing it through calcium oxide granules before it is collected by upward delivery.}

nitrogen		N₂	_{Taking out the other gases from a sample of air. The nitrogen gas is collected over water.}

sulphur dioxide		SO₂	_{Adding concentrated sulphuric acid to pieces of copper. The sulphur dioxide gas is dried by passing it through concentrated sulphuric acid before collecting it by downward delivery.}