Download Problem Set - Balancing Chemical Equations I

Problem Set - Balancing Chemical Equations I
Name:
Period:
Chemistry
RF Mandes, PhD, NBCT
Date:
Part I
Balance each chemical equation by placing the appropriate coefficient in the blank.
1.
__H2SO4
+
__NaCl

__HCl
2.
__AlBr3
+
__NaOH

__Al(OH)3 +
__NaBr

__KNO2
+
__O2
3.
__KNO3
+
__Na2SO4
4.
__Fe
+
__H2SO4

__Fe2(SO4)3 +
__H2
5.
__O2
+
__CS2

__CO2
+
__SO2
6.
__Mg
+
__N2

__Mg3N2
7.
__FeO
+
__C

__Fe
+
__CO2
8.
__Ni
+
__Co2(SO3)3 
__NiSO3
+
__Co

__H2O
+
__O2
9.
__H2O2
10.
__CaC2
+
__H2O

__Ca(OH)2 +
__C2H2
11.
__WO3
+
__H2

__W
+
__H2O
12 .
__IrCl3
+
__NaOH

__Ir2O3
+
__HCl
Part II
+
__NaCl
Write the chemical equation that corresponds to the word equation.
Then balance the chemical equation.
13.
iron
+
oxygen

iron (III) oxide
14.
zinc
+
sodium chloride

zinc (II) chloride
+
sodium
15.
barium nitrate
+
lithium sulfate

barium sulfate
+
lithium nitrate
Problem Set - Balancing Chemical Equations I
Part III
16.
Write the word equation and the unbalanced chemical equation that corresponds to the reaction
that is described.
When calcium carbonate is heated strongly, carbon dioxide gas is driven off, leaving a residue of calcium
oxide in the flask.
Word equation:
Unbalanced equation:
17.
Solid ammonium carbonate, (NH4)2CO3, is used as the active ingredient in smelling salts. When solid
ammonium carbonate is heated, it decomposes into ammonia gas, NH 3, carbon dioxide gas and water vapor.
Word Equation:
Unbalanced equation:
18.
Silver (I) oxide is decomposed when heated strongly to silver metal and oxygen gas, O 2.
Word equation:
Unbalanced equation:
19.
Acetylene gas, C2H2, is often used by plumbers, welders and glass-blowers because it burns in oxygen, O2,
with an intensely hot white flame. The products of the combustion of acetylene are carbon dioxide and water
vapor.
Word equation:
Unbalanced equation:
20.
Methanol, CH3OH, is an important industrial chemical. Methanol may be produced from the carbon
monoxide gas and hydrogen gas, H2, under certain conditions of temperature and pressure.
Word equation:
Unbalanced equation: