Download Word and Skeleton Equations Practice (ws Fall 2010)

Chemical Equations -
and
Equation Practice
Write the WORD and SKELETON equations for each chemical reaction. Indicate the state of each reactant
and product in the skeleton equation. Remember that the following seven elements are diatomic:
hydrogen, H2(g); nitrogen, N2(g); oxygen O2(g); fluorine, F2(g); chlorine Cl2(g); bromine, Br2(l); and iodine, I2(s).
1. Gaseous hydrogen and oxygen react to form gaseous water.
2. Solid sodium metal reacts with liquid water to form an aqueous solution of sodium hydroxide and
hydrogen gas.
3. Solid potassium chlorate breaks down to form solid potassium chloride and oxygen gas.
4. Solid copper reacts with oxygen gas to form solid copper(II) oxide.
5. When aqueous solutions of silver nitrate and sodium chloride are combined, the reaction produces an
aqueous solution of sodium nitrate and a precipitate of silver chloride.
6. The complete combustion of propane gas, C3H8(g), in the presence of oxygen gas forms gaseous water
and carbon dioxide.
7. Sulfur trioxide gas reacts with liquid water to form an aqueous solution of sulfuric acid.
8. Solid ammonium chloride is formed when hydrogen chloride gas reacts with gaseous ammonia.
9. Solid aluminum and gaseous fluorine form when solid aluminum fluoride breaks down.
10. Liquid mercury reacts with oxygen gas to form solid mercury(II) oxide.
Chemical Equations -
and
Equation Practice
Write the WORD and SKELETON equations for each chemical reaction. Indicate the state of each reactant
and product in the skeleton equation. Remember that the following seven elements are diatomic:
hydrogen, H2(g); nitrogen, N2(g); oxygen O2(g); fluorine, F2(g); chlorine Cl2(g); bromine, Br2(l); and iodine, I2(s).
1. Gaseous hydrogen and oxygen react to form gaseous water.
2. Solid sodium metal reacts with liquid water to form an aqueous solution of sodium hydroxide and
hydrogen gas.
3. Solid potassium chlorate breaks down to form solid potassium chloride and oxygen gas.
4. Solid copper reacts with oxygen gas to form solid copper(II) oxide.
5. When aqueous solutions of silver nitrate and sodium chloride are combined, the reaction produces an
aqueous solution of sodium nitrate and a precipitate of silver chloride.
6. The complete combustion of propane gas, C3H8(g), in the presence of oxygen gas forms gaseous water
and carbon dioxide.
7. Sulfur trioxide gas reacts with liquid water to form an aqueous solution of sulfuric acid.
8. Solid ammonium chloride is formed when hydrogen chloride gas reacts with gaseous ammonia.
9. Solid aluminum and gaseous fluorine form when solid aluminum fluoride breaks down.
10. Liquid mercury reacts with oxygen gas to form solid mercury(II) oxide.
Chemical Equations – Word and Skeleton Equation Practice SOLUTIONS
1. hydrogen + oxygen  water
2 H2(g) + O2(g)  2 H2O(g)
2. sodium + water  sodium hydroxide + hydrogen
2 Na(s) + 2 H2O(l)  2 NaOH(aq) + H2(g)
3. potassium chlorate  potassium chloride + oxygen
2 KClO3(s)  2 KCl(s) + 3 O2(g)
4. copper + oxygen  copper(II) oxide
2 Cu(s) + O2(g)  2 CuO(s)
5. silver nitrate + sodium chloride  sodium nitrate + silver chloride
AgNO3(aq) + NaCl(aq)  NaNO3(aq) + AgCl(s)
6. propane + oxygen  carbon dioxide + water
C3H8(g) + 5 O2(g)  3 CO2(g) + 4 H2O(g)
7. sulfur trioxide + water  sulfuric acid
SO3(g) + H2O(l)  H2SO4(aq)
8. ammonia + hydrogen chloride  ammonium chloride
NH3(g) + HCl(aq)  NH4Cl(s)
9. aluminum fluoride  aluminum + fluorine
2 AlF3(s)  2 Al(s) + 3 F2(g)
10.
mercury + oxygen mercury(II) oxide
2 Hg(l) + O2(g)  2 HgO(s)