Chemical Equations Name______Write chemical equations. Use phase symbols.

When iron wire is heated in the presence of sulfur, S8 the iron soon begins to glow, and a chunky, blue-black mass of iron(II)sulfide is formed.

When finely divided solid sodium is dropped into a flask containing chlorine gas an explosion occurs and a fine powder of sodium chloride is deposited on the walls of the flask.

Suburban homes sometimes use bottled propane gas, C3H8, for cooking purposes. When propane is burned in air, carbon dioxide and water vapor are produced (the presence of water vapor may be demonstrated by holding a cool dish above a burning propane flame, allowing liquid water to form on the cool surface). Write the balanced chemical equation for the reaction of gaseous propane with oxygen gas.

When hydrogen sulfide, H2S, gas is bubbled through a solution of lead(II)nitrate, a black precipitate of lead(II) sulfide, forms, and nitric acid, is produced. Write the unbalanced chemical equation for this reaction.

When an electric current is passed through an aqueous solution of potassium iodide, hydrogen gas is evolved at one electrode, while iodine, is produced at the other electrode.

When a strip of magnesium is heated in oxygen, it bursts into an intensely white flame and produces a finely powdered dust of magnesium oxide.

Although magnesium metal does not react readily with cold water, magnesium reacts easily with steam(H2O), producing magnesium hydroxide and hydrogen gas. Chemical Equations Name______Write chemical equations. Use phase symbols.

When solid red phosphorus, P4, is burned in air, the phosphorus combines with oxygen, producing a choking cloud of tetraphosphorus decoxide.

When copper(II) oxide is boiled in an aqueous solution of sulfuric acid, a strikingly blue solution of copper(II)sulfate forms along with additional water.

When lead(II)sulfide is heated to high temperatures in a stream of pure oxygen gas, solid lead(II)oxide forms with the release of gaseous sulfur dioxide.

If ordinary table sugar (sucrose, C12H22O11) is heated strongly in pure oxygen gas, it will ignite and burn, producing carbon dioxide gas and water vapor.