Name:
Types of Chemical Reactions
Match each type of chemical reaction in Column II with its description in Column I. Write the
correct reaction in the space provided.
Column I
Column II
1.) A precipitate, water, or a gas forms when two
ionic compounds are dissolved in a solution.
a. synthesis reaction
b. decomposition reaction
2.) Two or more substances combine to form another
substance.
c. single replacement reaction
3.) One element replaces another in a compound.
d. double replacement reaction
4.) A substance breaks down into two or more
simpler substances.
Classify each of the following chemical reactions as a synthesis reaction (S), decomposition
reaction (D), single replacement reaction (S/R), double replacement reaction (D/R), or combustion
(C).
5.) 4Fe + O2  2Fe2O3
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6.) Zn + 2HCl  ZnCl2 + H2
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7.) MgCO3 + 2HCl  MgCl2 + H2CO3
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8.) NiCl2  Ni + Cl2
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9.) 4C + 6H2 + O2  2C2H6O2
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10.) 2LiI + Pb(NO3)2  2LiNO3 + PbI2
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11.) C12H22O11  12C + 11H20
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12.) CdCO3  CdO + CO2
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13.) Cl2 + 2KBr  2KCl + Br2
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14.) BaCl2 + 2KIO3  Ba(IO3)2 + KCl
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15.) C25H52 + 38O2  26H20 + 25CO2
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16.) CuSO4·5H20  CuSO4 + 5H20
17.) 2Na + Cl2  2NaCl
18.) C3H8 + 5O2  3CO2 + 4H20
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Determine whether the italicized term makes each statement true or false. If the statement is true,
write the word “true” in the blank. If the statement is false, write in the blank the term that
makes the statement true.
___________________________ 1. In a single replacement reaction, water, a gas, or a precipitate
formed when two ionic compounds are dissolved in a solution.
___________________________ 2. In a decomposition reaction, two or more substances combine
to form another substance.
___________________________ 3. An insoluble compound formed in a double replacement
reaction is called a precipitate.
___________________________ 4. In a single replacement reaction, one element replaces another
element in a compound.
___________________________ 5. If water is broken down to form hydrogen gas and oxygen gas,
a single replacement reaction has taken place.
___________________________ 6. In a double replacement reaction, a substance is broken down
to form two or more simpler substances.
___________________________ 7. If carbon and oxygen unite to form carbon dioxide, a synthesis
reaction has occurred.
___________________________ 8. A double replacement reaction involves covalent compounds.
Answer the following questions on the lines provided.
9. The term synthesis means “to put together.” How does the meaning of the term synthesis relate
to a synthesis reaction? _____________________________________________________________
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10. The term decompose means “to break down” or “take apart.” How does the meaning of the
term decompose relate to a decomposition reaction? ______________________________________
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