Name ______ KEY ___________________________________ Date _________ Period ______
Writing Skeleton and Word Equations
Write skeleton equations from the following word equations:
1.
Bromine reacts with magnesium iodide to form magnesium bromide and iodine.
Br2 + MgI2  MgBr2 + I2
2.
Ammonia gas (NH3) reacts with hydrogen monochloride gas to form solid ammonium
chloride.
NH3 (g) + HCl (g)  NH4Cl (s)
3.
Solid manganese (II) iodide decomposes when exposed to light to form solid manganese
and gaseous iodine.
MnI2 (s) →
4.
Mn (s) + I2 (g)
Methane gas (CH4) is heated with oxygen gas to produce carbon dioxide gas and water
vapor.
CH4 (g) + O2 (g) →
CO2 (g) + H2O (g)
Write word equations from the following formula equations.
5.
Li2O + H2O  2 LiOH
Lithium oxide and water react to form lithium hydroxide.
6.
CaCO3 (s) →
CaO (s) + CO2 (g)
At 298 K, solid calcium carbonate decomposes to form solid calcium oxide and
carbon dioxide gas.
7.
Zn + S  ZnS
Zinc and sulfur react to form zinc sulfide.
8.
BaF2 (aq) + Na2CO3 (aq)  BaCO3 (s) + 2 NaF (aq)
Aqueous solutions of barium fluoride and sodium carbonate react to form solid
barium carbonate and aqueous sodium fluoride.