The Nature Of Science And Engineering, Physical Science Worksheet With Answers - Minnesota K-12 Page 12
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1243. For each of the following reactions, indicate which substance is oxidized and
which is reduced. Which substance is the oxidizing agent and which is the
reducing agent?
a. 2Al + 3Cl
→ 2AlCl
2
3
Oxidized
Reduced
Oxidizing Agent
Reducing Agent
Al
Cl
Cl
Al
2
2
+
-
2+
3+
2+
b. 8H
+ MnO
+ 5Fe
→ 5Fe
+ Mn
+ 4H
O
4
2
Oxidized
Reduced
Oxidizing Agent
Reducing Agent
2+
-
2+
-
Fe
MnO
Fe
MnO
4
4
-
+
2-
3+
c. FeS + 3NO
+ 4H
→ 3NO + SO
+ Fe
+ 2H
O
3
4
2
Oxidized
Reduced
Oxidizing Agent
Reducing Agent
-
-
FeS
NO
NO
FeS
3
3
d. Zn + 2HCl → ZnCl
+ 2H
2
2
Oxidized
Reduced
Oxidizing Agent
Reducing Agent
Zn
HCl
HCl
Zn
44. Using the information gathered in this unit determine the relative activities of
the metals. If the following redox reactions are found to occur spontaneously,
identify the more active metal in each reaction.
2+
+
a. 2Li + Cu
→ 2Li
+ Cu
Li
3+
2+
b. Cr + 3V
→ 3V
+ Cr3+
V
3+
2+
2+
c. Cd + 2Ti
→ 2Ti
+ Cd
Ti
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