Oxidation-Reduction Reactions Chemistry Worksheet Page 29
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41235
Chapter Problems
31. Are the electrons in the following redox reactions transferred completely from
the atoms of one element to the atoms of another or are they only partially
transferred?
a. 2K(s) + F
(g) → 2KF(s)
2
(g) + O
(g) → 2H
b. 2H
O(l )
2
2
2
32.
Are the electrons in the following redox reactions transferred completely from
the atoms of one element to the atoms of another or are they only partially
transferred?
(s) + 8O
(g) → 8SO
a. S
( g)
8
2
2
(s) + 6Cl
(g) → 4PCl
b. P
(l )
4
2
3
33. Are the electrons in the following redox reactions transferred completely from
the atoms of one element to the atoms of another or are they only partially
transferred?
a. Ca(s) + Cl
(g) → CaCl
(s)
2
2
b. 4Cu(s) + O
(g) → 2Cu
O(s)
2
2
34.
Aluminum bromide, AlBr
, which is used to add bromine atoms to organic
3
compounds, can be made by passing gaseous bromine over hot aluminum.
Which of the following half‑reactions for this oxidation‑reduction reaction
describes the oxidation, and which one describes the reduction?
2Al → 2Al
3+
+ 6e
‒
+ 6e
‒
→ 6Br
‒
3Br
2
35. Iodine, I
, has many uses, including the production of dyes, antiseptics,
2
photographic film, pharmaceuticals, and medicinal soaps. It forms when chlorine,
Cl
, reacts with iodide ions in a sodium iodide solution. Which of the following
2
half‑reactions for this oxidation‑reduction reaction describes the oxidation, and
which one describes the reduction?
+ 2e
‒
→ 2Cl
‒
Cl
2
‒
→ I
+ 2e
‒
2I
2
Section 6.2 Oxidation Numbers
36.
Determine the oxidation number for the atoms of each element in the following
O
3
bjeCtive
formulas.
a. S
c. Na
S
8
2
2‒
b. S
d. FeS
37. Determine the oxidation number for the atoms of each element in the following
O
3
bjeCtive
formulas.
a. P
d. P
O
4
2
3
b. PF
e. H
PO
3
3
4
c. PH
3
38.
Determine the oxidation number for the atoms of each element in the following
O
3
bjeCtive
formulas.
a. Sc
O
c. N
2
3
2
b. RbH
d. NH
3
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