Chapter 8 Chemical Equations Solutions To Review Questions Page 8
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9- Chapter 8 -
35. (a)
2 H
(g)
O
(g)
2 H
O(g)
2
2
2
(b)
CH
(g)
H
O(g)
3 H
(g)
CO(g)
4
2
2
CO(g)
H
O(g)
H
(g)
CO
(g)
2
2
2
(c)
CH
(g)
2 O
(g)
2 H
O(g)
CO
(g)
4
2
2
2
(d)
One molecule of carbon dioxide is produced from one molecule of methane regardless of whether
it is converted into hydrogen gas or burned in oxygen. If the goal is to reduce carbon dioxide
emission, there is no advantage in using hydrogen synthesized from methane as a fuel.
36. (a)
Pb(NO
)
(aq)
K
CrO
(aq)
2 KNO
(aq)
PbCrO
(s)
Lead(II) chromate
3
2
2
4
3
4
(b)
CdCl
(aq)
Li
S(aq)
CdS(s)
2 LiCl(aq)
Cadmium sulfide
2
2
(c)
Pb(C
H
O
)
(aq)
H
CO
(aq)
PbCO
(s)
2 HC
H
O
(aq)
Lead(II) carbonate
2
3
2
2
2
3
3
2
3
2
(d)
Hg(NO
)
(aq)
Na
S(aq)
HgS(s)
2 NaNO
(aq)
Mercury(II) sulfide
3
2
2
3
(g)
(e)
4 Ti(s)
3 O
2 Ti
O
(s)
Titanium(III) oxide
2
2
3
(g)
(f)
4 Fe(s)
3 O
2 Fe
O
(s)
Iron(III) oxide
2
2
3
D
37. (a)
2 ZnO
2 Zn
O
2
D
D
(b)
SnO
Sn
O
or 2 SnO
2 SnO
O
2
2
2
2
D
(c)
Na
CO
Na
O
CO
2
3
2
2
D
(d)
Mg ClO
MgCl
3 O
3 2
2
2
Mg s
2 HCl aq
g
aq
38. (a)
H
MgCl
2
2
2 NaBr aq
g
2 NaCl aq
l
(b)
Cl
Br
2
2
(c)
3 Zn s
2 Fe NO
aq
2 Fe s
3 Zn NO
aq
3 3
3 2
(d)
2 Al s
3 Cu NO
aq
3 Cu s
2 Al NO
aq
3 2
3 3
aq
aq
s
aq
39. (a)
2 NH
PO
3 Ba NO
Ba
PO
6 NH
NO
4 3
4
3 2
3
4 2
4
3
(b)
Na
S aq
Pb C
H
O
aq
PbS s
2 NaC
H
O
aq
2
2
3
2 2
2
3
2
aq
aq
s
aq
(c)
CuSO
Ca ClO
CaSO
Cu ClO
4
3 2
4
3 2
aq
aq
aq
O l
(d)
Ba OH
H
C
O
BaC
O
2 H
2
2
4
2
2
2
2
(e)
H
PO
aq
3 KOH aq
K
PO
aq
3 H
O l
3
4
3
4
2
aq
aq
aq
O l
g
(f)
H
SO
Na
CO
Na
SO
H
CO
2
4
2
3
2
4
2
2
aq
aq
aq
s
40. (a)
K
SO
Ba C
H
O
2 KC
H
O
BaSO
2
4
2
3
2
3
2
4
2
(b)
H
SO
aq
2 LiOH aq
Li
SO
aq
2 H
O l
2
4
2
4
2
(c)
NH
PO
aq
NaBr aq
no reaction
4 3
4
aq
aq
aq
2 AgI s
(d)
CaI
2 AgNO
Ca NO
2
3
3 2
aq
aq
aq
O l
(e)
2 HNO
Sr OH
Sr NO
2 H
3
3 2
2
2
(f)
CsNO
aq
Ca OH
aq
No reaction
3
2
- 90 -
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