Chemistry
Name: ____________________
UNIT: Chemical Reactions
Unit Review
1. How many atoms of each type are represented in each of the following?
a. 5 O2
b. 2 NaCl
c. 4 Ca3(PO4)2
d. 4 C4H8
2. For each of the following synthesis reactions, identify the missing reactant(s) or product(s), and then
balance the resulting equation:
a.
_____
b.
Li
+ O2
→ Fe2O3
→
+ Cl2
______
3. Complete and balance the equations for each of the following decomposition reactions:
a.
NaCl →
b.
CaO
→
4. Complete and balance the equations for the following single-replacement reactions:
a.
Zn
+
Pb(NO3)2
b.
Li
+
HOH
→
c.
F2
+
NaI
→
→
5. Complete and balance the equations for the following double-replacement reactions:
Mg (NO3)2
b.
HCl
c.
In letter a, which product forms a precipitate?
+
+
KOH
→
a.
NaOH
→
6. List the three possible products that can be formed in a double-replacement reaction.
7. Complete and balance the equations for the following combustion reactions:
a.
C4H10
+
_____
→
b.
C7H14
+
_____
→
8. What the three gases we produced and tested for in this unit? How do you test for each?
9. Using the activity series, predict whether each of the possible reactions listed below will occur. For the
reactions that will occur, write the products. Then balance. If no reaction occurs, write NR.
→
a.
Ag
+
FeCl2
b.
Li
+
Cu(NO3)2
→
10. List 4 signs that a reaction has occurred:
11. Decide whether the following salts are soluble or insoluble in water:
NaCl
BaCl2
Cu2S
NH4NO3
12. Sodium solid and chlorine gas combine in an irreversible reaction to form solid sodium chloride.
a.) Write a balanced chemical equation for this reaction. (include all symbols, including state)
b.) What type of reaction is this?
13. Classify the following reactions by type: (they may not be balanced, that's ok)
CH4 +
NaCl
O2 →
CO2 + H2O
→
+ AgNO3
AgCl
+ NaNO3
H2O → H2 + O2
14. Describe how you determine if a single-replacement reaction will actually take place, and give an
example.
15. The following equations contain errors. Identify the error(s) and re-write the equations correctly.
Na2O →
Al +
Cl2
Na2 + O
→ AlCl2
AgNO3 + CaCl2 → CaNO3 + AgCl2
HNO3 + Sr(OH)2 → SrNO3 + H(OH)2
16. What are the four factors that affect the rate at which a chemical reaction occurs? How does each one
affect the reaction rate?
17. Write a balanced chemical equation for each description below.
Solid Iodine reacts with aqueous sodium chloride.
Solid sodium oxide decomposes
Solid aluminum metal reacts with chlorine gas
Hydrochloric acid reacts with solid calcium hydroxide