WORKSHEET ON WRITING EQUATIONS
Write symbolic equations and balance the following reactions. Indicate all phases. Identify the
type of reaction shown in each equation - S, D, SR, DR, C, or AB.
1. Magnesium metal + oxygen gas  solid magnesium oxide (very rapid reaction)
2. Solid calcium carbonate  solid calcium oxide + carbon dioxide gas
3. Water solution of silver nitrate + copper metal  water solution of cupric nitrate +
silver metal
4. Aqueous sodium sulfide + aqueous copper (II) chloride  aqueous sodium chloride +
copper (II) sulfide precipitate
5. Aqueous potassium phosphate + aqueous calcium nitrate  aqueous potassium nitrate + solid
calcium phosphate
6. Nitric acid + aqueous calcium hydroxide  aqueous calcium nitrate and water
7. Solid potassium chlorate  solid potassium chloride + oxygen gas
8. A water solution of barium hydroxide + hydrochloric acid  aqueous barium chloride + water
9. Solid sodium reacts with water to form a sodium hydroxide solution, hydrogen gas and energy
10. When heated, solid silver oxide forms solid silver and oxygen gas
11. Butane gas rapidly reacts with oxygen gas to produce carbon dioxide gas and water vapor.
12. When heated, dinitrogen tetroxide gas decomposes into nitrogen dioxide gas.
13. Heating solid cobalt (II) carbonate produces solid cobalt (II) oxide and carbon dioxide gas.
14. When chlorine gas is bubbled through an aqueous solution of calcium iodide, solid iodine
and aqueous calcium chloride is produced.
15. Nitrogen gas + oxygen gas  dinitrogen pentoxide gas (very slow reaction)
16. Sulfurous acid + aqueous lithium hydroxide  water and a lithium sulfite solution