Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
86 Chemistry: Matter and Change
Solving Problems: A Chemistry Handbook
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER 9
Example Problem 9-3
Using an Activity Series to Predict Single-Replacement
Reactions
Use the above activity series to predict the single-replacement
reaction that will occur between aluminum metal and lead(II)
nitrate (Pb(NO 3 ) 2 ) in a water solution and write its balanced
chemical equation.
Aluminum is above lead in the activity series and therefore is more
active. It will replace lead in its compounds in water solution. A
single-replacement reaction will take place to form the nitrate of aluminum, a group 13 metal. The skeleton equation is shown below.
Al(s) ϩ Pb(NO 3 ) 2 (aq) 0 Al(NO 3 ) 3 (aq) ϩ Pb(s)
Adding coefficients, the balanced chemical equation is shown below.
2Al(s) ϩ 3Pb(NO 3 ) 2 (aq) 0 2Al(NO 3 ) 3 (aq) ϩ 3Pb(s)
Practice Problems
4. Predict whether a single-replacement reaction will occur
between the following pairs of possible reactants. If so, write a
balanced chemical equation for the reaction.
a. chlorine gas and aqueous potassium iodide
b. magnesium metal and aqueous copper(II) sulfate
c. copper metal and iron(III) chloride in water solution
d. lead metal and aqueous silver nitrate
In another type of replacement reaction, called a double-replacement
reaction, there is an exchange of positive ions between two compounds, often in water solution. Often, a solid of low solubility is
produced during the reaction and settles out of the solution. Such a
solid is called a precipitate. An example of a double-replacement
reaction that produces the precipitate lead(II) chloride is the
following.
Pb(NO 3 ) 2 (aq) ϩ 2NaCl(aq) 0 2NaNO 3 (aq) ϩ PbCl 2 (s)
Practice Problems
5. Write a balanced chemical equation for each of the following
double-replacement reactions.
86 Chemistry: Matter and Change
Solving Problems: A Chemistry Handbook
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER 9
Example Problem 9-3
Using an Activity Series to Predict Single-Replacement
Reactions
Use the above activity series to predict the single-replacement
reaction that will occur between aluminum metal and lead(II)
nitrate (Pb(NO 3 ) 2 ) in a water solution and write its balanced
chemical equation.
Aluminum is above lead in the activity series and therefore is more
active. It will replace lead in its compounds in water solution. A
single-replacement reaction will take place to form the nitrate of aluminum, a group 13 metal. The skeleton equation is shown below.
Al(s) ϩ Pb(NO 3 ) 2 (aq) 0 Al(NO 3 ) 3 (aq) ϩ Pb(s)
Adding coefficients, the balanced chemical equation is shown below.
2Al(s) ϩ 3Pb(NO 3 ) 2 (aq) 0 2Al(NO 3 ) 3 (aq) ϩ 3Pb(s)
Practice Problems
4. Predict whether a single-replacement reaction will occur
between the following pairs of possible reactants. If so, write a
balanced chemical equation for the reaction.
a. chlorine gas and aqueous potassium iodide
b. magnesium metal and aqueous copper(II) sulfate
c. copper metal and iron(III) chloride in water solution
d. lead metal and aqueous silver nitrate
In another type of replacement reaction, called a double-replacement
reaction, there is an exchange of positive ions between two compounds, often in water solution. Often, a solid of low solubility is
produced during the reaction and settles out of the solution. Such a
solid is called a precipitate. An example of a double-replacement
reaction that produces the precipitate lead(II) chloride is the
following.
Pb(NO 3 ) 2 (aq) ϩ 2NaCl(aq) 0 2NaNO 3 (aq) ϩ PbCl 2 (s)
Practice Problems
5. Write a balanced chemical equation for each of the following
double-replacement reactions.