Oxidation-Reduction Reactions Chemistry Worksheet Page 40
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41246
Chapter 6
Oxidation-Reduction Reactions
90. Determine the oxidation number for each atom in the following equations and
decide whether each reaction is a redox reaction or not. If the reaction is redox,
identify which substance is oxidized, which is reduced, the oxidizing agent, and
the reducing agent.
(s) + 4HNO
a. 2Ag
CrO
(aq)
2
4
3
→ 4AgNO
(aq) + H
(aq) + H
Cr
O
O(l )
3
2
2
7
2
‒
(aq) + 3IO
‒
(aq) + H
b. 2MnO
O(l )
4
3
2
→ 2MnO
(s) + 3IO
‒
(aq) + 2OH
‒
(aq)
2
4
91.
For each of the following equations, determine the oxidation number for each
atom in the equation and identify whether the reaction is a redox reaction or not.
If the reaction is redox, identify what is oxidized, what is reduced, the oxidizing
agent, and the reducing agent.
a. Ca(s) + F
(g) → CaF
(s)
2
2
b. 2Al(s) + 3H
O(g) → Al
(s) + 3H
O
(g)
2
2
3
2
92. Determine the oxidation number for each atom in the following equations and
decide whether each reaction is a redox reaction or not. If a reaction is redox,
identify which substance is oxidized, which is reduced, the oxidizing agent, and
the reducing agent.
+
2‒
(aq) + 6Cl
‒
(aq) + 14H
(aq) → 2Cr
3+
(aq) + 3Cl
(g) + 7H
a. Cr
O
O(l )
2
7
2
2
(aq) + 2KMnO
(aq) + 3H
b. 5H
C
O
SO
(aq)
2
2
4
4
2
4
→ 10CO
(g) + 2MnSO
(aq) + 8H
O(l ) + K
SO
(aq)
2
4
2
2
4
93.
The following equations represent reactions used by the U.S. chemical industry.
Classify each with respect to the following categories: combination reaction,
decomposition reaction, and single‑displacement reaction.
+ 5O
+ 6H
O → 4H
a. P
PO
4
2
2
3
4
+ O
→ TiO
+ 2Cl
b. TiCl
4
2
2
2
∆
c. CH
(g) + H
CH
( g)
CH
CH
(g)
3
3
2
2
2
94. The following equations represent reactions used by the U.S. chemical industry.
Classify each with respect to the following categories: combination reaction,
decomposition reaction, combustion reaction, and single‑displacement reaction.
a. 2HF + SiF
→ H
SiF
4
2
6
S + 3O
→ 2SO
+ 2H
b. 2H
O
2
2
2
2
∆
c. CH
O + H
OH
CH
3
2
2
95.
Write a balanced equation for the redox reaction of carbon dioxide gas and
hydrogen gas to form carbon solid and water vapor.
96. Phosphorus pentachloride, which is used to add chlorine atoms to other
substances, can be made from the reaction of phosphorus trichloride and
chlorine. The phosphorus pentachloride is the only product. Write a balance
equation, without including states, for this redox reaction.
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